/*

Javascript helper functions for Zymurgy:CM (www.zymurgycm.com).

*/

function ZymurgyFactory() {

	this.lightAJAX = function(url,onComplete) {

		var req;

		if (window.XMLHttpRequest) {

			req = new XMLHttpRequest();

		}

		else if (window.ActiveXObject) {

			req = new ActiveXObject("Microsoft.XMLHTTP");

		}

		else {

			//No AJAX available...

			return;

		}

		req.open('get',url,true);

		req.onreadystatechange = function() {

			if (onComplete)

				onComplete(req);

		};

		req.send(null);

	};

	

	this.getparam = function (name)

	{

		name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");

		var regexS = "[\\?&]"+name+"=([^&#]*)";

		var regex = new RegExp( regexS );

		var results = regex.exec( window.location.href );

		if( results == null )

			return false;

		else

			return results[1];

	}

	

	this.track = function(userid) {

		var url = "/zymurgy/tracking.php?r="+escape(document.referrer)+"&u="+userid;

		var tag = this.getparam('zcmtag');

		if (tag)

		{

			url += "&t="+escape(tag);

		}

		if (document.cookie.indexOf("zcmtracking")==-1)

		{

			var expTicks = 1000 * // milliseconds

				60 * // seconds

				60 * // minutes

				24 * // hours

				365* // days

				10;  // years

			var exp = new Date();

			exp.setTime(exp.getTime() + expTicks);

			var setTrackingCookie = function(req) {

				var trckid = req.responseText;

				document.cookie = "zcmtracking="+trckid+"; expires="+exp.toGMTString() + "; path=/;";

			};

			this.lightAJAX(url,setTrackingCookie);

		} else {

			this.lightAJAX(url);

		}

	};

	

	this.toggleText = function(el, a, b) {

		if (el.value == a)

			el.value = b;

		else

			el.value = a;

	};

	

	this.enableHint = function(elTextbox) {

		elTextbox._oldTextBoxColor = YAHOO.util.Dom.getStyle(elTextbox,'color');

		elTextbox._showingHint = false;

		var ShowHint = function() {

			if (elTextbox.value == '')

			{

				var title = YAHOO.util.Dom.getAttribute(elTextbox,'title');

				if (title)

				{

					elTextbox._oldTextBoxColor = YAHOO.util.Dom.getStyle(elTextbox,'color');

					YAHOO.util.Dom.setStyle(elTextbox,'color','#aaaaaa');

					elTextbox.value = title;

					elTextbox._showingHint = true;

					return;

				}

				elTextbox._showingHint = false;

			}

			else

			{

				elTextbox._showingHint = false;

			}

		};

		YAHOO.util.Event.addListener(elTextbox, "focus", function () {

			if (elTextbox._showingHint)

			{

				YAHOO.util.Dom.setStyle(this,'color',elTextbox._oldTextBoxColor);

				elTextbox.value = '';

			}

		});

		YAHOO.util.Event.addListener(elTextbox, "blur", function () {

			ShowHint();

		});

		ShowHint();

	};

	

	this.refreshHint = function(elTextbox) {

		if (elTextbox._showingHint)

		{

			var title = YAHOO.util.Dom.getAttribute(elTextbox,'title');

			elTextbox.value = title;

		}

	}

	

	return this;

};



var Zymurgy = ZymurgyFactory();