/*
###############################################################################
##
##	Type		:	Class
##	Description	:	Browser Detection
##	Author		:	www.quirksmode.org
##
###############################################################################
*/
	var BrowserDetect = {
		init: function () {
			this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
			this.version = this.searchVersion(navigator.userAgent)
				|| this.searchVersion(navigator.appVersion)
				|| "an unknown version";
			this.OS = this.searchString(this.dataOS) || "an unknown OS";
		},
		searchString: function (data) {
			for (var i=0;i<data.length;i++)	{
				var dataString = data[i].string;
				var dataProp = data[i].prop;
				this.versionSearchString = data[i].versionSearch || data[i].identity;
				if (dataString) {
					if (dataString.indexOf(data[i].subString) != -1)
						return data[i].identity;
				}
				else if (dataProp)
					return data[i].identity;
			}
		},
		searchVersion: function (dataString) {
			var index = dataString.indexOf(this.versionSearchString);
			if (index == -1) return;
			return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
		},
		dataBrowser: [
			{
				string: navigator.vendor,
				subString: "Apple",
				identity: "Safari"
			},
			{
				prop: window.opera,
				identity: "Opera"
			},
			{
				string: navigator.vendor,
				subString: "iCab",
				identity: "iCab"
			},
			{
				string: navigator.vendor,
				subString: "KDE",
				identity: "Konqueror"
			},
			{
				string: navigator.userAgent,
				subString: "Firefox",
				identity: "Firefox"
			},
			{	// for newer Netscapes (6+)
				string: navigator.userAgent,
				subString: "Netscape",
				identity: "Netscape"
			},
			{
				string: navigator.userAgent,
				subString: "MSIE",
				identity: "Explorer",
				versionSearch: "MSIE"
			},
			{
				string: navigator.userAgent,
				subString: "Gecko",
				identity: "Mozilla",
				versionSearch: "rv"
			},
			{ 	// for older Netscapes (4-)
				string: navigator.userAgent,
				subString: "Mozilla",
				identity: "Netscape",
				versionSearch: "Mozilla"
			}
		],
		dataOS : [
			{
				string: navigator.platform,
				subString: "Win",
				identity: "Windows"
			},
			{
				string: navigator.platform,
				subString: "Mac",
				identity: "Mac"
			},
			{
				string: navigator.platform,
				subString: "Linux",
				identity: "Linux"
			}
		]
	
	};	
	
	var steps = Array(0,0,0,'');
	function checkHeight() {
		var introFrame = document.getElementById('intro');
		var conferenceFrame = document.getElementById('conferences');
		if (introFrame.offsetHeight > conferenceFrame.offsetHeight) {
			//conferenceFrame.style.height = introFrame.offsetHeight + 'px';
		} else {
			introFrame.style.height = conferenceFrame.offsetHeight  + 'px';
		}
	}
	function backStep() { 
		steps[0]=steps[0]-1;
		step(steps[0],0); 
	}

	function step(step,id) {
		steps[0] = step;
		if (id > 0 || id.length > 0) { steps[step] = id; }
		switch(step) {
			case 1: 
				document.getElementById('conferences').className='step1 rr_content';
				loadTopics();
				break;
			case 2:
				document.getElementById('conferences').className='step2 rr_content';
				loadCountries(steps[step]);
				break;
			case 3:
				document.getElementById('conferences').className='step3 rr_content';
				loadConferences();
				break;
		}
	}
	function loadTopics() {
		document.getElementById('options').innerHTML = '<div class="loading"><img src="templates/images/loading.gif" align="absmiddle" border="0"/> loading avaliable topics list ....<\/a>';
		var commentSuccess = function(o){ 
			document.getElementById('options').innerHTML = o.responseText;
		};
		var commentFailure = function(o){ alert(o.responseText );};
		YAHOO.util.Connect.asyncRequest('GET','load.php?s=1', {success: commentSuccess, failure: commentFailure});
	}
	function loadCountries(id) {
		document.getElementById('options').innerHTML = '<div class="loading"><img src="templates/images/loading.gif" align="absmiddle" border="0"/> loading countries topics list ....<\/a>';
		var commentSuccess = function(o){ 
			document.getElementById('options').innerHTML = o.responseText;
		};
		var commentFailure = function(o){ 
			document.getElementById('options').innerHTML = '<div class="loading">No Conferences Found..<\/a>';};
		YAHOO.util.Connect.asyncRequest('GET','/load.php?s=2&t='+id, {success: commentSuccess, failure: commentFailure});
	}
	function loadConferences() {
		document.getElementById('options').innerHTML = '<div class="loading"><img src="templates/images/loading.gif" align="absmiddle" border="0"/> loading upcomming conferences ....<\/a>';
		var commentSuccess = function(o){ 
			document.getElementById('options').innerHTML = o.responseText;
		};
		var commentFailure = function(o){ 
			document.getElementById('options').innerHTML = '<div class="loading">No Conferences Found..<\/a>';};
		YAHOO.util.Connect.asyncRequest('GET','/load.php?s=3&t='+steps[2] + '&c=' + steps[3], {success: commentSuccess, failure: commentFailure});
	
	}