$(function(){rollover.set()});


rollover = {
	
	set:function(){
	
     var image_cache = new Object();  
     $(".ro").not("[src*='_o.']").each(function(i) {  
         var imgsrc = this.src;  
         var dot = this.src.lastIndexOf('.');  
         var imgsrc_o = this.src.substr(0, dot) + '_o' + this.src.substr(dot, 4);  
         image_cache[this.src] = new Image();  
         image_cache[this.src].src = imgsrc_o;  
         $(this).hover(  
             function() { this.src = imgsrc_o; },  
             function() { this.src = imgsrc; }  
         );  
     });  

	}
}