var vBrowserType = "";
if (window.navigator.userAgent.indexOf("Firefox") != -1) vBrowserType = "Firefox";
if (window.navigator.userAgent.indexOf("MSIE") != -1) vBrowserType = "IE";
if (window.navigator.userAgent.indexOf("SV1") != -1) vBrowserType = "IESP2";
if (vBrowserType)
{
	var w = screen.availWidth;
	var h = screen.availHeight;
}
function openWindow(url, name, width, height, scrollbar)
{
	self.name = "main"; 
	var leftPos = (w-width)/2, topPos = (h-height)/2;
	popupWin = window.open(url, name, "width=" + width + ",height=" + height + ",scrollbars=" + scrollbar + ",top=" + topPos + ",left=" + leftPos + ",toolbar=no,directories=no,menubar=no");
}

function changeIt(ImgAlpha, ImgBeta) { 
if (document.images) { document[ImgAlpha].src = ImgBeta; } 
} 
if (document.images)
{ 
	img01 = new Image; 
	img01.src = "graphics/menu_01_on.png"; 
	img02 = new Image; 
	img02.src = "graphics/menu_02_on.png"; 
	img03 = new Image; 
	img03.src = "graphics/menu_03_on.png"; 
	img04 = new Image; 
	img04.src = "graphics/menu_04_on.png"; 
	img05 = new Image; 
	img05.src = "graphics/menu_05_on.png"; 
	img06 = new Image; 
	img06.src = "graphics/menu_06_on.png"; 
}