function preLoadImages(){
                 var i,allImages=new Array(), loadImages=new Array();
                 		 loadImages[0]='images/b_registrate.gif';
		 loadImages[1]='images/b_registrate_rol.gif';

                 for(i=0; loadImages.length>i; i++){
                   allImages[i]=new Image();
                   allImages[i].src = loadImages[i];
                 }
               }