jQuery(document).ready(function(){
	jQuery("#sign_icons li a").each(function(){
	   var bg_image = jQuery(this).css("background-image");
	   bg_image = bg_image.replace(/"/g,"").replace(/url\(|\)$/ig, ""); 
	   imgsrc = bg_image.replace(".jpg", "_hover.jpg"); 
	   (new Image()).src = imgsrc;   
	});


	jQuery(function(){
		var bg_image;
		jQuery("#sign_icons li a").mouseover(function(){
			bg_image = jQuery(this).css("background-image");
			bg_image = bg_image.replace(/"/g,"").replace(/url\(|\)$/ig, "");
			hover_image = bg_image.replace(".jpg", "_hover.jpg");
				jQuery(this).css("background-image", "url(" + hover_image + ")");
		}).mouseout(function(){
			jQuery(this).css("background-image", "url(" + bg_image + ")");
		});
	});
});