/* Preload images to avoid flickering on hover. */
      
      preload_image_object = new Image(); 
      image_url = new Array();
      
 	  image_url[0] = "/images/TRHMG/goBTN-hover.gif";
	  image_url[1] = "/images/TRHMG/searchBTN-hover.gif";
   	  image_url[2] = "/images/TRHMG/clearBTN-hover.gif";

       var i = 0;
       for(i=0; i<image_url.length; i++) 
         preload_image_object.src = image_url[i];