function hovChange(id){
	var filename = document.getElementById(id).src
	
	var appendPart
	if(filename.indexOf("?") > -1)
	{
		appendPart = filename.substring(filename.indexOf("?"),filename.length)
		filename = filename.substring(0,filename.indexOf("?"))
	}
	else
	{ appendPart = "" }
	  		
	if(filename.indexOf(".gif") > -1)
	{		
		if(filename.charAt(filename.length-5) == "_")
			{filename = filename.substring(0,filename.length-5) + ".gif" + appendPart}
		else
			{filename = filename.substring(0,filename.length-4) + "_.gif" + appendPart}
	}
	else if(filename.indexOf(".jpg") > -1)
	{
		if(filename.charAt(filename.length-5) == "_")
			{filename = filename.substring(0,filename.length-5) + ".jpg" + appendPart}
		else
			{filename = filename.substring(0,filename.length-4) + "_.jpg" + appendPart}
	}
	
	document.getElementById(id).src = filename
}

//sort through querystring using javascript
function getQueryVariable(variable)
{
	var i
	var query = window.location.search.substring(1);
	var vars = query.split("&");
	
	for (i = 0; i < vars.length; i++)
	{
		var pair = vars[i].split("=");
		if (pair[0] == variable)
		{
			return pair[1];
		}
	}
}