var rollovers=["graphics/about_us_on.gif","graphics/properties_on.gif","graphics/recreation_on.gif","graphics/contact_us_on.gif"];
var rollover=new Array();
window.onload=function(){
   var nav_links=document.getElementById("global_nav").getElementsByTagName("IMG");
  
   for(var i=0;i<nav_links.length;i++){
	   if(nav_links[i].parentNode.className!="active"){
		   nav_links[i].onmouseover=rollOver;
		   nav_links[i].onmouseout=rollOver;
		   nav_links[i].id="nav_"+i;
		   rollover["nav_"+i]=new Image();
		   rollover["nav_"+i].src=rollovers[i];
	   }
   }
}
function rollOver(){
   bufferImage=this.src;
   this.src=rollover[this.id].src;
   rollover[this.id].src=bufferImage;
}