/**********************************************************************/
/* These functions toggle the visibility of a DIV element on and off  */
/*                                                                    */
/**********************************************************************/

    
    function ShowPop(id)
	{
	document.getElementById(id).style.visibility = "visible";
	}
	
    function HidePop(id)
	{
	document.getElementById(id).style.visibility = "hidden";
	}
	
        
/**********************************************************************/
/* These functions implement the fade-in effect on our index.htm      */
/*                                                                    */
/*      - SlowPop() simply sets the interval for Fade()               */
/*      - Fade() is the function triggered by interval doing the      */
/*        actual adjustment of opacity.                               */
/**********************************************************************/
  
    var targetOpacity = 1.0,
    currentOpacity,
    interval = false,
    element;  
  
    function SlowPop(id)
	{
	element = document.getElementById(id);
        if (element == 'null')
            return;
	interval = setInterval ( "Fade()", 100 );
	}  
  
    function Fade( )
	{
	if (element.currentStyle)
            {
            currentOpacity = parseFloat (element.currentStyle.opacity);
            }	

	else if (window.getComputedStyle)
	    {
	    currentOpacity = parseFloat (window.getComputedStyle(element,null).opacity); 
	    }
	
	if (currentOpacity <= targetOpacity)
	    {
	    currentOpacity = currentOpacity + 0.1;
	    element.style.opacity = currentOpacity;
            
            /* This is for MSIE */
            element.style.filter = 'alpha(opacity = ' + parseInt( currentOpacity*100 ) +')';
	    }
	else
	    {
	    clearInterval(interval);
	    }
	}  
	





/* This is a browser detect function we use to detect Internet Explorer versions 6 and earlier */


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.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			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"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// 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.userAgent,
			   subString: "iPhone",
			   identity: "iPhone/iPod"
	    },
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();


/**********************************************************************/
/* Since we're relying on CSS, and know IE 6.0 and earlier to be      */
/* defective , we're checking the browser and warning the user        */
/*                                                                    */
/**********************************************************************/

function BrowserWarning ( )
    {
    if (BrowserDetect.browser == "Explorer" && BrowserDetect.version <= 6.9)
        {
        alert("Your browser is an older version of Microsoft Internet Explorer," +
              "which does not support standard CSS definitions. Because of this," +
              "some parts of this website might not display correctly");
	return;
        }
    }




/******************************************************************************/
/*                                                                            */
/*  These are executed at page load                                           */  
/*                                                                            */
/******************************************************************************/

    /* Check against old Internet Explorers known to fail with CSS definitions.
    Check against Internet Explorer -derivatives on mobile platforms, as even new
    versions of MSIE do not know how to properly manage CSS based on viewport width.
    These users of MSIE will receives a warning */
    BrowserWarning();
    
    /* This causes a fade-in effect for a DIV */
    /* setTimeout('SlowPop("pop")', 500); */