// Browser Detection
isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? true : false;
NS4 = (document.layers) ? true : false;
IEmac = ((document.all)&&(isMac)) ? true : false;
IE4plus = (document.all) ? true : false;
IE4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
IE5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.")!=-1)) ? true : false;

IE6 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 6.")!=-1)) ? true : false;
ver4 = (NS4 || IE4plus) ? true : false;
NS6 = (!document.layers) && (navigator.userAgent.indexOf('Netscape')!=-1)?true:false;

IE5plus = IE5 || IE6;
IEMajor = 0;

if (IE4plus)
{
	var start = navigator.appVersion.indexOf("MSIE");
	var end = navigator.appVersion.indexOf(".",start);
	IEMajor = parseInt(navigator.appVersion.substring(start+5,end));
	IE5plus = (IEMajor>=5) ? true : false;
}

// Body onload utility (supports multiple onload functions)
var gSafeOnload = new Array();
function SafeAddOnload(f)
{
	if (IEmac && IE4)  // IE 4.5 blows out on testing window.onload
	{
		window.onload = SafeOnload;
		gSafeOnload[gSafeOnload.length] = f;
	}
	else if  (window.onload)
	{
		if (window.onload != SafeOnload)
		{
			gSafeOnload[0] = window.onload;
			window.onload = SafeOnload;
		}		
		gSafeOnload[gSafeOnload.length] = f;
	}
	else
		window.onload = f;
}
function SafeOnload()
{
	for (var i=0;i<gSafeOnload.length;i++)
		gSafeOnload[i]();
}

function isInt(numIn)
{
	var checknum = parseInt(numIn);
	return !isNaN(checknum);
}

function PUW_Init()
{
	if (gPopupWindow.CheckFrequency())
	{
		setTimeout("gPopupWindow.Show()",gPopupWindow.showDelay);
	}
}

function PUW_Show()
{
	var settings = "width="+this.width+",height="+this.height+",top="+this.top+",left="+this.left+",";
	settings += "scrollbars=" + ((this.scrollbars) ? "yes," : "no,");
	settings += "toolbar=" + ((this.toolbar) ? "yes," : "no,");
	settings += "location=" + ((this.locationbar) ? "yes," : "no,");
	settings += "menubar=" + ((this.menubar) ? "yes," : "no,");
	settings += "status=" + ((this.statusbar) ? "yes," : "no,");
	settings += "resizable=" + ((this.resizable) ? "yes" : "no");
	
	var newWin = window.open(this.url,this.name,settings);
	
	if (! this.ontop)
		window.focus();
}

function PUW_CheckFrequency()
{
	var shouldShow = this.frequency != 0;
	if (this.frequency > 0)
	{
		var allCookies = document.cookie;
		var start = allCookies.indexOf("PUWCount=");
		if (start >= 0)
		{
			var end = allCookies.indexOf(";",start);
			if (end < 0)
				end = allCookies.length;
			var freqStr = allCookies.substring(start+9,end);
			if (isInt(freqStr))
				this.frequency = parseInt(freqStr);
		}

		if (this.frequency>0)
			this.frequency--;
		else
			shouldShow = false;
			
		var exp = new Date();
		exp.setTime(exp.getTime()+this.renew*60*60000);
		document.cookie = "PUWCount="+this.frequency+ "; expires=" + exp.toGMTString();
	}
	
	return shouldShow;
}


function PopupWindow(url,width,height)
{
	this.width = width;
	this.height = height;
	this.top = screen.availHeight/2 - height/2; // center
	this.left = screen.availWidth/2 - width/2; // center
	this.name = "mypopupwin";
	this.url = url;
	this.showDelay = 2000;
	this.frequency = 2; // how many times show per renewal time period
	this.renew = 1; // renew showing every x hours
	this.scrollbars= false;
	this.toolbar= false;
	this.statusbar= false;
	this.resizable = false;
	this.locationbar = false;
	this.menubar = false;
	this.ontop = true;
	

	
	this.Init = PUW_Init;
	this.Show = PUW_Show;
	this.CheckFrequency = PUW_CheckFrequency;
}

function PUWStart()
{
	gPopupWindow.Init();
}

SafeAddOnload(PUWStart);


gPopupWindow = new PopupWindow("signup.html", 300, 200);
gPopupWindow.toolbar = false;
gPopupWindow.statusbar = false;
gPopupWindow.resizable = false;
gPopupWindow.ontop = true;
gPopupWindow.frequency = 1;
gPopupWindow.renew = 1;
gPopupWindow.showDelay = 2000;