function SwapImg(obj) {
	if (obj.background == "images/nav_side_off.gif") {
		obj.background = "images/nav_side_on.gif"
	}
	else {
		obj.background = "images/nav_side_off.gif"
	}
}

function SwapImgSub(obj) {
	if (obj.background == "images/nav_top_on.gif") {
		obj.background = "images/nav_top_fill.gif"
	}
	else {
		obj.background = "images/nav_top_on.gif"
	}
}

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