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/menuadvon.png"; 
}

function checkNum(fldsrc)
{
	var vValue = document.getElementById(fldsrc).value;
	var bReset = false;
	if (isNaN(vValue) && vValue != "")
	{
		bReset = true;
		alert("Item quantity must be a number\n");
	}
	if (vValue.indexOf('.') >= 0)
	{
		bReset = true;
		alert("Item quantity cannot contain a decimal\n");
	}
	if (bReset == true)
	{
		document.getElementById(fldsrc).value = "";
		setTimeout("document.getElementById(fldsrc).focus()", 10);
	}
}

function initSelect()
{
	var theSelect = document.getElementById("selector");
	
	theSelect.changed = false;
	theSelect.onfocus = selectFocussed;
	theSelect.onchange = selectChanged;
	theSelect.onkeydown = selectKeyed;
	theSelect.onclick = selectClicked;
	
	return true;
}


function changeLocation(menuObj)
{
   var i = menuObj.selectedIndex;

   if(i > 0)
   {
      window.location = menuObj.options[i].value;
   }
}

function submitCartForm(form)
{
//***1.this section ensures that a numerical quantity has been entered
if( isNaN(form.Quantity.value) ){
	alert("You must enter a numerical quantity");
	form.Quantity.focus();return}
//document.images["addButton"].src = "graphics/addedButton.gif"
form.addButton.value="Item Added"
form.submit();
}