var userAgent = navigator.userAgent.toLowerCase();
var is_webtv = userAgent.indexOf('webtv') != -1;
var is_kon = userAgent.indexOf('konqueror') != -1;
var is_mac = userAgent.indexOf('mac') != -1;
var is_saf = userAgent.indexOf('applewebkit') != -1 || navigator.vendor == 'Apple Computer, Inc.';
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_moz = (navigator.product == 'Gecko' && !is_saf) && userAgent.substr(userAgent.indexOf('firefox') + 8, 3);
var is_ns = userAgent.indexOf('compatible') == -1 && userAgent.indexOf('mozilla') != -1 && !is_opera && !is_webtv && !is_saf;
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera && !is_saf && !is_webtv) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);



function copycode(obj) {
	if(is_ie && obj.style.display != 'none') {
		var rng = document.body.createTextRange();
		rng.moveToElementText(obj);
		rng.scrollIntoView();
		rng.select();
		rng.execCommand("Copy");
		rng.collapse(false);
	}
}

function toggle_collapse(objname, unfolded) {
	if(isUndefined(unfolded)) {
		var unfolded = 1;
	}
	var obj = $(objname);
	var oldstatus = obj.style.display;
	var collapsed = getcookie('codebox_collapse');
	var cookie_start = collapsed ? collapsed.indexOf(objname) : -1;
	var cookie_end = cookie_start + objname.length + 1;

	obj.style.display = oldstatus == 'none' ? '' : 'none';
	collapsed = cookie_start != -1 && ((unfolded && oldstatus == 'none') || (!unfolded && oldstatus == '')) ?
			collapsed.substring(0, cookie_start) + collapsed.substring(cookie_end, collapsed.length) : (
			cookie_start == -1 && ((unfolded && oldstatus == '') || (!unfolded && oldstatus == 'none')) ?
			collapsed + objname + ' ' : collapsed);

	setcookie('codebox_collapse', collapsed, (collapsed ? 86400 * 30 : -(86400 * 30 * 1000)));

	if(img = $(objname + '_img')) {
		var img_regexp = new RegExp((oldstatus == 'none' ? '_yes' : '_no') + '\\.gif$');
		var img_re = oldstatus == 'none' ? '_no.gif' : '_yes.gif';
		img.src = img.src.replace(img_regexp, img_re);
	}
	if(symbol = $(objname + '_symbol')) {
		symbol.innerHTML = symbol.innerHTML == '+' ? '-' : '+';
	}
}

function getcookie(name) {
	var cookie_start = document.cookie.indexOf(name);
	var cookie_end = document.cookie.indexOf(";", cookie_start);
	return cookie_start == -1 ? '' : unescape(document.cookie.substring(cookie_start + name.length + 1, (cookie_end > cookie_start ? cookie_end : document.cookie.length)));
}

function setcookie(cookieName, cookieValue, seconds, path, domain, secure) {
	var expires = new Date();
	expires.setTime(expires.getTime() + seconds);
	document.cookie = escape(cookieName) + '=' + escape(cookieValue)
		+ (expires ? '; expires=' + expires.toGMTString() : '')
		+ (path ? '; path=' + path : '/')
		+ (domain ? '; domain=' + domain : '')
		+ (secure ? '; secure' : '');
}

function $(id) {
	return document.getElementById(id);
}

function trim(str) {
	return (str + '').replace(/(\s+)$/g, '').replace(/^\s+/g, '');
}

function fetchCheckbox(cbn) {
	return $(cbn) && $(cbn).checked == true ? 1 : 0;
}

function isUndefined(variable) {
	return typeof variable == 'undefined' ? true : false;
}


// Start syntax_hilite.js
function getBrowserType() {
	var detect = navigator.userAgent.toLowerCase();
	var browser;
	var doCheckIt = function (bString) {
		place = detect.indexOf(bString) + 1;
		return place;
	};
	if (doCheckIt('konqueror')) { browser = "konqueror"; }
	else if (doCheckIt('safari')) { browser = "safari"; }
	else if (doCheckIt('omniweb')) { browser = "omniweb"; }
	else if (doCheckIt('opera')) { browser = "opera"; }
	else if (doCheckIt('webtv')) { browser = "webtv"; }
	else if (doCheckIt('icab')) { browser = "icab"; }
	else if (doCheckIt('msie')) { browser = "msie"; }
	else if (doCheckIt('firefox')) { browser = "firefox"; }
	else if (!doCheckIt('compatible')) { browser = "nn"; }
	return browser;
}

function strTrim(str) {
	var i,j;
	i = 0;
	j = str.length-1;
	str = str.split("");
	while(i < str.length) {
		if(str[i]==" ") {
			str[i] = "";
		} else {
			break;
		}
		i++;
	}
	while(j > 0) {
		if(str[j]== " ") {
			str[j]="";
		} else {
			break;
		}
		j--;
	}
	return str.join("");
}

function igEncodeHTML(igHTML) {
	var regExLT = /</g;
	var regExGT = />/g;
	igHTML = igHTML.replace(regExLT, "&lt;");
	igHTML = igHTML.replace(regExGT, "&gt;");
	return igHTML;
}

function doCleanUp(sTxt) {
	sTxt = sTxt.replace(/(\r\n|\r|\n)/g, "\n");
	var arrTxt = sTxt.split("\n");
	for(i=0; i<arrTxt.length; i++) {
		if(arrTxt[i].substr((arrTxt[i].length-1), 1)==" ") {
			arrTxt[i] = arrTxt[i].substr(0, (arrTxt[i].length-1));
		}
		if(arrTxt[i].substr((arrTxt[i].length-1), 1)=="	") {
			arrTxt[i] = arrTxt[i].substr(0, (arrTxt[i].length-1));
		}
	}
	sTxt = arrTxt.join("\n");
	var regExNL1a = /([\n]{2,})/g;			//to find two consecutive 'newlines'
	var regExNL1b = /([ ]{1,})\n/g;			//to find more than 1 whitespace before 'newline'
	var regExNL1c = /([	|\t]{1,})\n/g;		//to find more than 1 tab before 'newline'
	var regExNL1d = /\n([ ]{1,})\n/g;		//to find a line with only spaces
	var regExNL1e = /\n([	|\t]{1,})\n/g;	//to find a line with only tabs
	var regExNL1g = / {4}/g;				//to find 4 space chars
	sTxt = sTxt.replace(regExNL1g, "	");
	sTxt = sTxt.replace(regExNL1d, "\n").replace(regExNL1e, "\n");
	sTxt = sTxt.replace(regExNL1b, "\n").replace(regExNL1c, "\n");
	sTxt = sTxt.replace(regExNL1a, "\n");
	if(sTxt.substr(0, 1)=="\n") {
		sTxt = sTxt.substr(1, sTxt.length);
	}
	if(sTxt.substr((sTxt.length-1), 1)=="\n") {
		sTxt = sTxt.substr(0, (sTxt.length-1));
	}
	return sTxt;
}

function getTagCode(sID) {
	var myBrowser = strTrim(navigator.appName.substring(0, 9));
	myBrowser = myBrowser.toLowerCase();
	if(document.getElementById) {
		oDoc = document.getElementById(sID);
	} else if(document.all) {
		oDoc = document.all[sID];
	}
	var getTxt = "";
	if(typeof(oDoc.innerText) != 'undefined') {
		getTxt = strTrim(oDoc.innerText);
	} else {
		getTxt = strTrim(oDoc.innerHTML);	//textContent doesn't keep \n with <LI>, so use innerHTML
		var regExLi = /<\/li>/gi;		//RegEx to find </li>
		var regExHTML = /<\S[^>]*>/g;	//RegEx to find HTML Tags
		var regExAnd = /&amp;/g;		//to find ampersand as HTML entity
		var regExSpace = /&nbsp;/g;		//to find whitespace as HTML entity
		var regExLT = /&lt;/g;			//to find < as HTML entity
		var regExGT = /&gt;/g;			//to find > as HTML entity
		getTxt = getTxt.replace(regExLi, "\n");		//replace </li> with \n
		getTxt = getTxt.replace(regExHTML, "");		//strip out all HTML Tags
		getTxt = getTxt.replace(regExAnd, "&");		//replace &amp; with &
		getTxt = getTxt.replace(regExSpace, " ");	//replace &nbsp; with simple whitespace
		getTxt = getTxt.replace(regExLT, "<");		//replace &lt; with <
		getTxt = getTxt.replace(regExGT, ">");		//replace &gt; with >
	}
	return getTxt;
}

function showCodeTxt(sId) {
	var cdTxt = igEncodeHTML(getTagCode(sId));
	cdTxt = doCleanUp(cdTxt);
	var cdTxtPrefix = "<html><head><title>WP-CODEBOX &raquo; Plain-Text View</title><style>body { margin:0px; padding:0px; white-space:nowrap; }</style></head><body><pre>\n";
	var cdTxtSuffix = "\n</pre><br /></body></html>";
	cdWin = window.open("about:blank", "cdWin", "toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=700,height=400,left=35,top=85");
	cdWin.document.open();
	cdWin.document.write(cdTxtPrefix+cdTxt+cdTxtSuffix);
	cdWin.document.close();
}

function getCodeTxt(sId) {
	var cdTxt = igEncodeHTML(getTagCode(sId));
	cdTxt = doCleanUp(cdTxt);
	return cdTxt;
}

function hidePlainTxt(bID) {
	var oCodeBox = document.getElementById(bID);
	if(arrCode[bID]=="") {
		alert("The HTML View for this Code Box is not available");
	} else {
		var lnkID = "l"+bID;
		lnkID = lnkID.toLowerCase();
		var oLnk = document.getElementById(lnkID);
		var sInnerHTML = "<a href=\"#\" onclick=\"javascript:showPlainTxt('"+bID+"'); return false;\">PLAIN TEXT</a>";
		oLnk.innerHTML = sInnerHTML;
		oCodeBox.innerHTML = "";
		oCodeBox.innerHTML = arrCode[bID];
		arrCode[bID] = "";
	}
}

function showPlainTxt(bID) {
	var sHtmlCode, sPlainCode, sInnerHTML, oLnk, intHeightDiff, intWidthDiff;
	var browserName = getBrowserType();
	if(browserName=="msie") {
		intHeightDiff = 20;
		intWidthDiff = 5;
	} else if(browserName=="opera") {
		intHeightDiff = 20;
		intWidthDiff = 12;
	} else if(browserName=="firefox") {
		intHeightDiff = 20;
		intWidthDiff = 12;
	}
	var oCodeBox = document.getElementById(bID);
	//get InnerHTML
	sHtmlCode = oCodeBox.innerHTML;
	arrCode[bID] = sHtmlCode;
	var lnkID = "l"+bID;
	lnkID = lnkID.toLowerCase();
	oLnk = document.getElementById(lnkID);
	sInnerHTML = "<a href=\"#\" onclick=\"javascript:hidePlainTxt('"+bID+"'); return false;\">HILITED HTML</a>";
	oLnk.innerHTML = sInnerHTML;
	sPlainCode = getCodeTxt(bID);
	var cbHeight = oCodeBox.parentNode.clientHeight;
	var cbWidth = oCodeBox.parentNode.clientWidth;
	var ptHeight = cbHeight-intHeightDiff;
	var ptWidth = cbWidth-intWidthDiff;
	sPlainCodeHTML = "<textarea style=\"width:"+ptWidth+"px; height:"+ptHeight+"px;\" wrap=\"off\">"+sPlainCode+"</textarea>";
	oCodeBox.innerHTML = "";
	oCodeBox.innerHTML = sPlainCodeHTML;
}