/*
 * TripleFlap, a flying twitter bird v1.2 for Blogger
 *
 * Autor	: Florian Buenzli
 * Copyright: Florian Buenzli, 2010
 * For Blogger by : ZKB (GeT Trickz)
 * Url		:http://www.gettrickz.blogspot.com/
 * Plugin Page	:http://www.gettrickz.blogspot.com/
 */

if (typeof(twitterAccount) != "string") var twitterAccount = "";
if (typeof(tweetThisText) != "string" || tweetThisText == "") var tweetThisText = document.title + " " + document.URL;
if (typeof(showTweet) != "boolean") var showTweet = false;
var tweetthislink = null;
if (typeof(otherPageOrFeed) != "string" || otherPageOrFeed == "") var otherPageOrFeed = false;
var birdSprite = "http://2.bp.blogspot.com/_nDNgmK8FIyI/TTPu1fD8gwI/AAAAAAAAASk/umOvdnb827E/way2blogging.org-twitterbirdsprite.png";
var twitterfeedreader = ""; 
var hyperlinkStyle = "color:#27b;text-decoration:none;";
var birdSpeed = 12;
var birdSpaceVertical = 16;
var birdSetUp = 2;
var spriteWidth = 64;
var spriteHeight = 64;
var spriteAniSpeed = 72;
var spriteAniSpeedSlow = Math.round(spriteAniSpeed * 1.75);
var targetElems = new Array("img", "hr", "input", "textarea", "button", "select", "table", "td", "div", "ul", "ol", "li", "h1", "h2", "h3", "h4", "p", "code", "object", "a", "b", "strong", "span");
var neededElems4random = 10;
var minElemWidth = Math.round(spriteWidth / 3);
var scareTheBirdMouseOverTimes = 4;
var scareTheBirdTime = 1000;
var showOnMobile = false;
var birdIsFlying = false;
var scrollPos = 0;
var windowHeight = getWindowHeight();
var windowWidth = getWindowWidth();
if (windowHeight <= spriteHeight + 2 * birdSpaceVertical) windowHeight = spriteHeight + 2 * birdSpaceVertical + 1;
if (windowWidth <= spriteWidth) windowWidth = spriteWidth + 1;
var birdPosX = Math.round(Math.random() * (windowWidth - spriteWidth + 200) - 200);
var birdPosY = -2 * spriteHeight;
var timeoutAnimation = false;
var timeoutFlight = false;
var showButtonsTimeout = null;
var hideButtonsTimeout = null;
var scareTheBirdLastTime = 0;
var scareTheBirdCount = 0;

function tripleflapInit(reallystart) {
	if (typeof(reallystart) == "undefined") {
		window.setTimeout("tripleflapInit(1)", 250);
		return;
	}
	if (!showOnMobile && typeof(navigator.userAgent) == "string" && is_mobile(navigator.userAgent)) {
		return;
	}
	if (!is_utf8(tweetThisText)) tweetThisText = utf8_encode(tweetThisText);
	var tweetthislink = "http://gettrickz.blogspot.com/?" + escape(tweetThisText);
	if (twitterAccount == "") showTweet = false;
	var accountURL = (twitterAccount != "") ? "http://facebook.com/pages/" + twitterAccount : ((otherPageOrFeed != false) ? otherPageOrFeed : "http://facebook.com/");
	var tBird = document.createElement("a");
	tBird.setAttribute("id", "tBird");
	tBird.setAttribute("href", accountURL);
	tBird.setAttribute("target", "_blank");
	tBird.style.display = "block";
	tBird.style.position = "absolute";
	tBird.style.left = birdPosX + "px";
	tBird.style.top = birdPosY + "px";
	tBird.style.width = spriteWidth + "px";
	tBird.style.height = spriteHeight + "px";
	tBird.style.background = "url('" + birdSprite + "') no-repeat transparent";
	tBird.style.backgroundPosition = "-0px -0px";
	tBird.style.zIndex = "947";
	tBird.onmouseover = function () {
		scareTheBird();
		showButtonsTimeout = window.setTimeout("showButtons(0," + windowWidth + "," + windowHeight + ")", 400);
		window.clearTimeout(hideButtonsTimeout);
	};
	tBird.onmouseout = function () {
		hideButtonsTimeout = window.setTimeout("hideButtons()", 50);
	};
	document.body.appendChild(tBird);
	var tBirdLtweet = document.createElement("a");
	tBirdLtweet.setAttribute("id", "tBirdLtweet");
	tBirdLtweet.setAttribute("href", tweetthislink);
	tBirdLtweet.setAttribute("target", "_blank");
	tBirdLtweet.setAttribute("title", "tweet this");
	tBirdLtweet.style.display = "none";
	tBirdLtweet.style.position = "absolute";
	tBirdLtweet.style.left = "0px";
	tBirdLtweet.style.top = "-100px";
	tBirdLtweet.style.background = "url('" + birdSprite + "') no-repeat transparent";
	tBirdLtweet.style.opacity = "0";
	tBirdLtweet.style.filter = "alpha(opacity=0)";
	tBirdLtweet.style.backgroundPosition = "-64px -0px";
	tBirdLtweet.style.width = "58px";
	tBirdLtweet.style.height = "30px";
	tBirdLtweet.style.zIndex = "951";
	tBirdLtweet.onmouseover = function () {
		window.clearTimeout(hideButtonsTimeout);
	};
	tBirdLtweet.onmouseout = function () {
		hideButtonsTimeout = window.setTimeout("hideButtons()", 50);
	};
	document.body.appendChild(tBirdLtweet);
	var tBirdLfollow = tBirdLtweet.cloneNode(false);
	tBirdLfollow.setAttribute("id", "tBirdLfollow");
	tBirdLfollow.setAttribute("href", accountURL);
	tBirdLfollow.setAttribute("title", "follow " + (twitterAccount ? "@" + twitterAccount : "me"));
	tBirdLfollow.style.backgroundPosition = "-64px -30px";
	tBirdLfollow.style.width = "58px";
	tBirdLfollow.style.height = "20px";
	tBirdLfollow.style.zIndex = "952";
	tBirdLfollow.onmouseover = function () {
		window.clearTimeout(hideButtonsTimeout);
	};
	tBirdLfollow.onmouseout = function () {
		hideButtonsTimeout = window.setTimeout("hideButtons()", 50);
	};
	document.body.appendChild(tBirdLfollow);
	if (showTweet == true) {
		var tBirdStatxLow = document.createElement("div");
		tBirdStatxLow.setAttribute("id", "tBirdStatxLow");
		tBirdStatxLow.style.display = "none";
		tBirdStatxLow.style.position = "absolute";
		tBirdStatxLow.style.left = "0px";
		tBirdStatxLow.style.top = "-100px";
		tBirdStatxLow.style.background = "transparent";
		tBirdStatxLow.style.opacity = "0";
		tBirdStatxLow.style.filter = "alpha(opacity=0)";
		tBirdStatxLow.style.width = "192px";
		tBirdStatxLow.style.zIndex = "955";
		tBirdStatxLow.onmouseover = function () {
			window.clearTimeout(hideButtonsTimeout);
		};
		tBirdStatxLow.onmouseout = function () {
			hideButtonsTimeout = window.setTimeout("hideButtons()", 50);
		};
		var tBirdStatxUpr = tBirdStatxLow.cloneNode(false);
		tBirdStatxUpr.setAttribute("id", "tBirdStatxUpr");
		tBirdStatxUpr.onmouseover = function () {
			window.clearTimeout(hideButtonsTimeout);
		};
		tBirdStatxUpr.onmouseout = function () {
			hideButtonsTimeout = window.setTimeout("hideButtons()", 50);
		};
		var tBirdStatxArrLow = document.createElement("div");
		tBirdStatxArrLow.setAttribute("id", "tBirdStatxArrLow");
		tBirdStatxArrLow.style.background = "url('" + birdSprite + "') no-repeat transparent";
		tBirdStatxArrLow.style.backgroundPosition = "-64px -50px";
		tBirdStatxArrLow.style.width = "32px";
		tBirdStatxArrLow.style.height = "9px";
		tBirdStatxArrLow.style.margin = "0 0 -1px 56px";
		tBirdStatxArrLow.style.position = "relative";
		tBirdStatxArrLow.style.zIndex = "957";
		var tBirdStatxArrUpr = tBirdStatxArrLow.cloneNode(false);
		tBirdStatxArrUpr.setAttribute("id", "tBirdStatxArrUpr");
		tBirdStatxArrUpr.style.backgroundPosition = "-96px -50px";
		tBirdStatxArrUpr.style.margin = "-1px 0 0 60px";
		var tBirdStatxInLow = document.createElement("div");
		tBirdStatxInLow.setAttribute("id", "tBirdStatxInLow");
		tBirdStatxInLow.style.background = "#fbfcfc";
		tBirdStatxInLow.style.border = "1px solid #555";
		tBirdStatxInLow.style.MozBorderRadius = "6px";
		tBirdStatxInLow.style.borderRadius = "6px";
		tBirdStatxInLow.style.padding = "3px 5px";
		tBirdStatxInLow.style.fontSize = "11px";
		tBirdStatxInLow.style.fontFamily = "Arial";
		tBirdStatxInLow.style.textAlign = "left";
		tBirdStatxInLow.style.position = "relative";
		tBirdStatxInLow.style.zIndex = "956";
		tBirdStatxInLow.innerHTML = "loading...";
		var tBirdStatxInUpr = tBirdStatxInLow.cloneNode(false);
		tBirdStatxInUpr.setAttribute("id", "tBirdStatxInUpr");
		tBirdStatxInUpr.innerHTML = "loading...";
		tBirdStatxLow.appendChild(tBirdStatxArrLow);
		tBirdStatxLow.appendChild(tBirdStatxInLow);
		tBirdStatxUpr.appendChild(tBirdStatxInUpr);
		tBirdStatxUpr.appendChild(tBirdStatxArrUpr);
		document.body.appendChild(tBirdStatxLow);
		document.body.appendChild(tBirdStatxUpr);
	}
	var timeoutAnimation = window.setTimeout("animateSprite(0,0,0,0,null,true)", spriteAniSpeed);
	window.onscroll = recheckposition;
	if (showTweet == true) loadStatusText();
	recheckposition();
}

function animateSprite(row, posStart, posEnd, count, speed, onlySet) {
	if (typeof(count) != "number" || count > posEnd - posStart) count = 0;
	document.getElementById("tBird").style.backgroundPosition = "-" + Math.round((posStart + count) * spriteWidth) + "px -" + (spriteHeight * row) + "px";
	if (onlySet == true) return;
	if (typeof(speed) != "number") speed = spriteAniSpeed;
	timeoutAnimation = window.setTimeout("animateSprite(" + row + "," + posStart + "," + posEnd + "," + (count + 1) + "," + speed + ")", speed);
}

function animateSpriteAbort() {
	window.clearTimeout(timeoutAnimation);
}

function recheckposition(force) {
	if (force != true) force = false;
	if (birdIsFlying) return false;
	windowHeight = getWindowHeight();
	windowWidth = getWindowWidth();
	if (windowHeight <= spriteHeight + 2 * birdSpaceVertical) windowHeight = spriteHeight + 2 * birdSpaceVertical + 1;
	if (windowWidth <= spriteWidth) windowWidth = spriteWidth + 1;
	if (typeof(window.pageYOffset) == "number") scrollPos = window.pageYOffset;
	else if (document.body && document.body.scrollTop) scrollPos = document.body.scrollTop;
	else if (document.documentElement && document.documentElement.scrollTop) scrollPos = document.documentElement.scrollTop;
	birdPosY = parseInt(document.getElementById("tBird").style.top);
	birdPosX = parseInt(document.getElementById("tBird").style.left);
	if (scrollPos + birdSpaceVertical >= birdPosY || scrollPos + windowHeight - spriteHeight < birdPosY || force) {
		hideButtons();
		elemPosis = chooseNewTarget();
		if (elemPosis.length < 1) {
			elemType = null;
			elemNr = null;
			elemTop = scrollPos + Math.round(Math.random() * (windowHeight - spriteHeight));
			elemLeft = Math.round(Math.random() * (windowWidth - spriteWidth));
			elemWidth = 0;
		} else {
			newTarget = elemPosis[Math.round(Math.random() * (elemPosis.length - 1))];
			elemType = newTarget[0];
			elemNr = newTarget[1];
			elemTop = newTarget[2];
			elemLeft = newTarget[3];
			elemWidth = newTarget[4];
		}
		targetTop = elemTop - spriteHeight;
		targetLeft = Math.round(elemLeft - spriteWidth / 2 + Math.random() * elemWidth);
		if (targetLeft > windowWidth - spriteWidth - 24) targetLeft = windowWidth - spriteWidth - 24;
		else if (targetLeft < 0) targetLeft = 0;
		birdIsFlying = true;
		flyFromTo(birdPosX, birdPosY, targetLeft, targetTop, 0);
	}
}

function chooseNewTarget() {
	var elemPosis = new Array();
	var obergrenze = scrollPos + spriteHeight + birdSpaceVertical;
	var untergrenze = scrollPos + windowHeight - birdSpaceVertical;
	for (var ce = 0; ce < targetElems.length; ce++) {
		var elemType = targetElems[ce];
		var sumElem = document.getElementsByTagName(elemType).length;
		for (var cu = 0; cu < sumElem; cu++) {
			var top = document.getElementsByTagName(elemType)[cu].offsetTop;
			var left = document.getElementsByTagName(elemType)[cu].offsetLeft;
			var width = document.getElementsByTagName(elemType)[cu].offsetWidth;
			if (top <= obergrenze || top >= untergrenze || width < minElemWidth || left < 0) {
				continue;
			}
			elemPosis[elemPosis.length] = new Array(elemType, cu, top, left, width);
			if (elemPosis.length >= neededElems4random) return elemPosis;
		}
	}
	return elemPosis;
}

function flyFromTo(startX, startY, targetX, targetY, solved, direction) {
	justStarted = (solved == 0);
	solved += (solved > birdSpeed / 2) ? birdSpeed : Math.round((solved == 0) ? birdSpeed / 4 : birdSpeed / 2);
	solvedFuture = solved + ((solved > birdSpeed / 2) ? birdSpeed : Math.round(birdSpeed / 2));
	distanceX = targetX - startX;
	distanceY = targetY - startY;
	distance = Math.sqrt(distanceX * distanceX + distanceY * distanceY);
	solvPerc = Math.abs(1 / distance * solved);
	solvDistX = Math.round(distanceX * solvPerc);
	solvDistY = Math.round(distanceY * solvPerc);
	solvPercFuture = Math.abs(1 / distance * solvedFuture);
	solvDistXFuture = Math.round(distanceX * solvPercFuture);
	solvDistYFuture = Math.round(distanceY * solvPercFuture);
	if (typeof(direction) != "string") {
		direction = null;
		angle = ((distanceX != 0) ? Math.atan((-distanceY) / distanceX) / Math.PI * 180 : 90) + ((distanceX < 0) ? 180 : 0);
		if (angle < 0) angle += 360;
		if (angle < 45) direction = 'o';
		else if (angle < 135) direction = 'n';
		else if (angle < 202.5) direction = 'w';
		else if (angle < 247.5) direction = 'sw';
		else if (angle < 292.5) direction = 's';
		else if (angle < 337.5) direction = 'so';
		else direction = 'o';
	}
	if (Math.abs(solvDistXFuture) >= Math.abs(distanceX) && Math.abs(solvDistYFuture) >= Math.abs(distanceY)) {
		animateSpriteAbort();
		switch (direction) {
		case 'so':
			animateSprite(1, 0, 0, 0, null, true);
			break;
		case 'sw':
			animateSprite(1, 2, 2, 0, null, true);
			break;
		case 's':
			animateSprite(0, 2, 2, 0, null, true);
			break;
		case 'n':
			animateSprite(4, 0, 0, 0, null, true);
			break;
		case 'o':
			animateSprite(1, 0, 0, 0, null, true);
			break;
		case 'w':
			animateSprite(1, 2, 2, 0, null, true);
			break;
		default:
			animateSprite(0, 0, 0, 0, null, true);
		}
		timeoutAnimation = window.setTimeout("animateSprite(0,0,0,0,null,true)", spriteAniSpeed);
	}
	if (Math.abs(solvDistX) >= Math.abs(distanceX) && Math.abs(solvDistY) >= Math.abs(distanceY)) {
		solvDistX = distanceX;
		solvDistY = distanceY;
		birdIsFlying = false;
		window.setTimeout("recheckposition()", 500);
	} else {
		if (justStarted) {
			animateSpriteAbort();
			switch (direction) {
			case 'so':
				animateSprite(1, 0, 0, 0, null, true);
				timeoutAnimation = window.setTimeout("animateSprite(1,1,1,0,null,true)", spriteAniSpeed);
				break;
			case 'sw':
				animateSprite(1, 2, 2, 0, null, true);
				timeoutAnimation = window.setTimeout("animateSprite(1,3,3,0,null,true)", spriteAniSpeed);
				break;
			case 's':
				animateSprite(0, 2, 2, 0, null, true);
				timeoutAnimation = window.setTimeout("animateSprite(0,3,3,0,null,true)", spriteAniSpeed);
				break;
			case 'n':
				timeoutAnimation = window.setTimeout("animateSprite(4,0,3,0," + spriteAniSpeedSlow + ")", 1);
				break;
			case 'o':
				animateSprite(1, 0, 0, 0, null, true);
				timeoutAnimation = window.setTimeout("animateSprite(2,0,3,0," + spriteAniSpeedSlow + ")", spriteAniSpeed);
				break;
			case 'w':
				animateSprite(1, 2, 2, 0, null, true);
				timeoutAnimation = window.setTimeout("animateSprite(3,0,3,0," + spriteAniSpeedSlow + ")", spriteAniSpeed);
				break;
			default:
				animateSprite(0, 0, 0, 0, null, true);
			}
		}
		timeoutFlight = window.setTimeout("flyFromTo(" + startX + "," + startY + "," + targetX + "," + targetY + "," + solved + ",'" + direction + "')", 50);
	}
	hideButtons();
	document.getElementById("tBird").style.left = (startX + solvDistX) + "px";
	document.getElementById("tBird").style.top = (startY + solvDistY + birdSetUp) + "px";
}

function scareTheBird(nul) {
	newTS = new Date().getTime();
	if (scareTheBirdLastTime < newTS - scareTheBirdTime) {
		scareTheBirdCount = 1;
		scareTheBirdLastTime = newTS;
	} else {
		scareTheBirdCount++;
		if (scareTheBirdCount >= scareTheBirdMouseOverTimes) {
			scareTheBirdCount = 0;
			scareTheBirdLastTime = 0;
			recheckposition(true);
		}
	}
}

function showButtons(step, winWidth, winHeight) {
	birdPosY = parseInt(document.getElementById("tBird").style.top);
	birdPosX = parseInt(document.getElementById("tBird").style.left);
	if (step == 0 && document.getElementById("tBirdLtweet").style.display == "block") step = 100;
	if (birdIsFlying) step = 0;
	opacity = Math.round(step * 15);
	if (opacity < 0) opacity = 0;
	if (opacity > 100) opacity = 100;
	if (birdPosX < winWidth - 300 || birdPosX < winWidth / 2) {
		buttonPosX1 = birdPosX + spriteWidth - 15;
		buttonPosX2 = birdPosX + spriteWidth - 10;
	} else {
		buttonPosX1 = birdPosX + 16 - parseInt(document.getElementById("tBirdLtweet").style.width);
		buttonPosX2 = birdPosX + 11 - parseInt(document.getElementById("tBirdLfollow").style.width);
	}
	buttonPosY1 = birdPosY - 0;
	buttonPosY2 = birdPosY - 0 + parseInt(document.getElementById("tBirdLtweet").style.height);
	document.getElementById("tBirdLtweet").style.left = buttonPosX1 + "px";
	document.getElementById("tBirdLtweet").style.top = buttonPosY1 + "px";
	document.getElementById("tBirdLtweet").style.display = "block";
	document.getElementById("tBirdLtweet").style.opacity = opacity / 100;
	document.getElementById("tBirdLtweet").style.filter = "alpha(opacity=" + opacity + ")";
	document.getElementById("tBirdLfollow").style.left = buttonPosX2 + "px";
	document.getElementById("tBirdLfollow").style.top = buttonPosY2 + "px";
	document.getElementById("tBirdLfollow").style.display = "block";
	document.getElementById("tBirdLfollow").style.opacity = opacity / 100;
	document.getElementById("tBirdLfollow").style.filter = "alpha(opacity=" + opacity + ")";
	if (showTweet == true) {
		if (typeof(window.pageYOffset) == "number") scrollPos = window.pageYOffset;
		else if (document.body && document.body.scrollTop) scrollPos = document.body.scrollTop;
		else if (document.documentElement && document.documentElement.scrollTop) scrollPos = document.documentElement.scrollTop;
		if (birdPosX < 64) boxMoveX = 64 - birdPosX;
		else if (birdPosX > winWidth - 64) boxMoveX = winWidth - birdPosX - 64;
		else boxMoveX = 0;
		txtBoxPosX = Math.round(birdPosX + spriteWidth / 2 - parseInt(document.getElementById("tBirdStatxLow").style.width) / 2 + boxMoveX);
		if (birdPosY < winHeight / 2 + scrollPos) {
			txtBoxPosY = birdPosY + spriteHeight;
			document.getElementById("tBirdStatxLow").style.left = txtBoxPosX + "px";
			document.getElementById("tBirdStatxLow").style.top = txtBoxPosY + "px";
			document.getElementById("tBirdStatxLow").style.display = "block";
			document.getElementById("tBirdStatxLow").style.opacity = opacity / 100;
			document.getElementById("tBirdStatxLow").style.filter = "alpha(opacity=" + opacity + ")";
		} else {
			txtBoxPosY = birdPosY - document.getElementById("tBirdStatxUpr").offsetHeight;
			document.getElementById("tBirdStatxUpr").style.left = txtBoxPosX + "px";
			document.getElementById("tBirdStatxUpr").style.top = txtBoxPosY + "px";
			document.getElementById("tBirdStatxUpr").style.display = "block";
			document.getElementById("tBirdStatxUpr").style.opacity = opacity / 100;
			document.getElementById("tBirdStatxUpr").style.filter = "alpha(opacity=" + opacity + ")";
		}
	}
	if (opacity >= 100) return;
	step++;
	showButtonsTimeout = window.setTimeout("showButtons(" + step + "," + winWidth + "," + winHeight + ")", 60);
}

function hideButtons() {
	window.clearTimeout(showButtonsTimeout);
	document.getElementById("tBirdLtweet").style.display = "none";
	document.getElementById("tBirdLtweet").style.opacity = "0";
	document.getElementById("tBirdLtweet").style.filter = "alpha(opacity=0)";
	document.getElementById("tBirdLfollow").style.display = "none";
	document.getElementById("tBirdLfollow").style.opacity = "0";
	document.getElementById("tBirdLfollow").style.filter = "alpha(opacity=0)";
	if (showTweet == true) {
		document.getElementById("tBirdStatxLow").style.display = "none";
		document.getElementById("tBirdStatxLow").style.opacity = "0";
		document.getElementById("tBirdStatxLow").style.filter = "alpha(opacity=0)";
		document.getElementById("tBirdStatxUpr").style.display = "none";
		document.getElementById("tBirdStatxUpr").style.opacity = "0";
		document.getElementById("tBirdStatxUpr").style.filter = "alpha(opacity=0)";
	}
}

function loadStatusText() {
	param = "tuac=" + twitterAccount;
	var req = (window.XMLHttpRequest) ? new XMLHttpRequest() : ((window.ActiveXObject) ? new ActiveXObject("Microsoft.XMLHTTP") : false);
	if (!req) {
		document.getElementById("tBirdStatxInLow").innerHTML = "Error: could not create Ajax-request";
	}
	req.open("POST", twitterfeedreader, true);
	req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	req.setRequestHeader("Content-Length", param.length);
	req.setRequestHeader("Connection", "close");
	req.onreadystatechange = function () {
		if (req.readyState == 4) {
			resp = (req.status == 200) ? req.responseText : "Error: Ajax-request failed,HTTP-Code " + req.status;
			resp = resp.replace(/<a /g, '<a style="' + hyperlinkStyle + '" ');
			document.getElementById("tBirdStatxInLow").innerHTML = resp;
			document.getElementById("tBirdStatxInUpr").innerHTML = resp;
		}
	}
	req.send(param);
}

function getWindowWidth() {
	if (typeof(window.innerWidth) == "number") ww = window.innerWidth;
	else if (document.documentElement && document.documentElement.clientWidth) ww = document.documentElement.clientWidth;
	else if (document.body && document.body.clientWidth) ww = document.body.clientWidth;
	else ww = 800;
	return ww;
}

function getWindowHeight() {
	if (typeof(window.innerHeight) == "number") wh = window.innerHeight;
	else if (document.documentElement && document.documentElement.clientHeight) wh = document.documentElement.clientHeight;
	else if (document.body && document.body.clientHeight) wh = document.body.clientHeight;
	else wh = 450;
	return wh;
}

function is_mobile(is_mobile_ua) {
	return (is_mobile_ua.toLowerCase().search(/(iphone|ipod|opera mini|windows ce|windows phone|palm|blackberry|android|symbian|series60|samsung|nokia|playstation portable|htc[\-_]|up\.browser|profile\/midp|[1-4][0-9]{2}x[1-4][0-9]{2})/) > -1)
}

function utf8_encode(str) {
	str = str.replace(/\r\n/g, "\n");
	utf8str = "";
	for (n = 0; n < str.length; n++) {
		c = str.charCodeAt(n);
		if (c < 128) {
			utf8str += String.fromCharCode(c);
		} else if (c > 127 && c < 2048) {
			utf8str += String.fromCharCode((c >> 6) | 192);
			utf8str += String.fromCharCode((c & 63) | 128);
		} else {
			utf8str += String.fromCharCode((c >> 12) | 224);
			utf8str += String.fromCharCode(((c >> 6) & 63) | 128);
			utf8str += String.fromCharCode((c & 63) | 128);
		}
	}
	return utf8str;
}

function is_utf8(str) {
	strlen = str.length;
	for (i = 0; i < strlen; i++) {
		ord = str.charCodeAt(i);
		if (ord < 0x80) continue;
		else if ((ord & 0xE0) === 0xC0 && ord > 0xC1) n = 1;
		else if ((ord & 0xF0) === 0xE0) n = 2;
		else if ((ord & 0xF8) === 0xF0 && ord < 0xF5) n = 3;
		else
		return false;
		for (c = 0; c < n; c++)
		if (++i === strlen || (str.charCodeAt(i) & 0xC0) !== 0x80) return false;
	}
	return true;
}