var is_nav, is_nav4,  is_nav4up, is_nav6, is_nav60_61, is_nav6up, is_gecko;
var is_ie, is_ie3, is_ie4, is_ie4up, is_ie5up, is_ie6;
var is_opera, is_opera2, is_opera3, is_opera4, is_opera5, is_opera6, is_opera6up;
var is_notsupported=true;

function BrowserDetect(){
	var agt=navigator.userAgent.toLowerCase();

	var is_major = parseInt(navigator.appVersion);
	var is_minor = parseFloat(navigator.appVersion);

	//We deal with Netscape first
	is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
		                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
		                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
	is_nav4 = (is_nav && (is_major == 4));
	is_nav4up = (is_nav && (is_major >= 4));
	is_nav6 = (is_nav && (is_major == 5));
	is_nav60_61 = is_nav6 && (agt.indexOf("netscape6/6.0")>=0 || agt.indexOf("netscape6/6.1")>=0);
	is_nav6up = (is_nav && (is_major >= 5));
	is_gecko = (agt.indexOf('gecko') != -1);
	
	//Internet Explorer now
	is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
	is_ie3    = (is_ie && (is_major < 4));
	is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
	is_ie4up  = (is_ie && (is_major >= 4));
	is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
	is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );

	//Opera now
	is_opera = (agt.indexOf("opera") != -1);
	is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
	is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
	is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
	is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
	is_opera6 = (agt.indexOf("opera 6") != -1 || agt.indexOf("opera/6") != -1);
	is_opera6up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5);

	//Plateforme mac
	var is_mac    = (agt.indexOf("mac")!=-1);

	//Otherwise it's not supported
	is_notsupported = !is_nav4 && !is_nav6up && !is_gecko && !is_ie4up && !is_opera6up;
	
	}

function LeftCorner()
	{
	if (is_ie4up)
		{
		if (is_ie4)
			return document.all.TopTable.offsetLeft;
		else
			{
			return document.getElementById("TopTable").offsetLeft;
			}
		}
	else
		{
		if ( (is_nav4up  ||  is_gecko) && !is_nav60_61)
			{
			for (i = 0; i < document.images.length; i++)
				{
				if (document.images[i].name == "NavMTitle")
					{
					var img=document.images[i];
					//alert(img);
					//alert(img.x);
					return (img.x);
					}
				}
			}
		else
			{
			return (window.innerWidth-1039)/2;
			}
		}
	}

function TopCorner()
	{
	if (is_ie4up || is_nav6up  || is_gecko)
		{
		if (is_ie4)
			return document.all.TopTable.offsetTop;
		else
			{
			return document.getElementById("TopTable").offsetTop;
			}
		}
	else
		{
		if (is_nav4up)
			{
			for (i = 0; i < document.images.length; i++)
				{
				if (document.images[i].name == "NavMTitle")
					{
					var img=document.images[i];
					return (img.y);
					}
				}
			}
		else
			return 0;
		}
	}