function newImage(arg) {
     if (document.images) {
          rslt = new Image();
          rslt.src = arg;
          return rslt;
     }
}

function changeImages() {
     if (document.images && (preloadFlag == true)) {
          for (var i=0; i<changeImages.arguments.length; i+=2) {
               document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
          }
     }
}

var preloadFlag = false;
function preloadImages() {
     if (document.images) {
		  phil_over = newImage("images/phil_over.gif");
		  cc_over = newImage("images/cc_over.gif");
		  serv_over = newImage("images/serv_over.gif");
		  perf_over = newImage("images/perf_over.gif");
		  sgn_over = newImage("images/sgn_over.gif");
		  tj_over = newImage("images/tj_over.gif");
		  ccc_over = newImage("images/ccc_over.gif");
		  th_over = newImage("images/th_over.gif");
		  mp_over = newImage("images/mp_over.gif");
		  news_over = newImage("images/news_over.gif");
		  ts_over = newImage("images/ts_over.gif");
          preloadFlag = true;
     }
}