$(document).ready(function(){
    function getQueryStringRegExp(name) 
	{    
		var reg = new RegExp("(^|\\?|&)"+ name +"=([^&]*)(\\s|&|$)", "i");
		if (reg.test(location.href))
			return unescape(RegExp.$2.replace(/\+/g, " "));
			return "";
	}
	
    var objtopitem = $('.topitem');
    var objsubnav = $('.subNav');
    objtopitem.hover(function(){
            var currentitem = $(this);
            $.each(objtopitem,function(i,n){
                if(currentitem[0]==n){objsubnav.eq(i).show();}else{objsubnav.eq(i).hide();}
            })
        },function(){
            var catID = getQueryStringRegExp('CatID');
             $('#Cat_'+catID).addClass('on');
            var currentCatItem = $('#Cat_'+catID).children('.subNav');
            objsubnav.hide();
            currentCatItem.show();
        }
    );
    
    var catID = getQueryStringRegExp('CatID');
     $('#Cat_'+catID).addClass('on');
    var currentCatItem = $('#Cat_'+catID).children('.subNav');
    
    currentCatItem.show();
    
})