$(document).ready(function() {

	
	//preload images
    $("img.hover").each(function(i){
        jQuery("<img>").attr("src", this.src.replace("_normal","_hover"));
    });
    
    //set mouseovers
    $("img.hover").hover(
        function(){ this.src = this.src.replace("_normal","_hover"); },
        function(){ this.src = this.src.replace("_hover","_normal"); }
    );
	
});