sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function selectUsedNav(){
   var w = document.used_cars_form.used_cars_list.selectedIndex;
   var url_add = document.used_cars_form.used_cars_list.options[w].value;
   if ( w == 0 ) { 
		return false; 
	} else { 
   window.location.href = url_add;
	}
   //window.open(url_add);
}
function selectNewNav(){
   var w = document.new_cars_form.new_cars_list.selectedIndex;
   var url_add = document.new_cars_form.new_cars_list.options[w].value;
   if ( w == 0 ) { 
		return false; 
	} else { 
   //window.location.href = url_add;
   window.open(url_add);
	}
}