function newImage (arg) {
rslt = new Image();
rslt.src = arg;
 if (location.search.indexOf ("image=1") == -1) return rslt;
	document.write ("<img src=" + arg + "><br>")
}

function changeImages() {
  if (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() {
		newImage ("images/home_2.gif");
		newImage ("images/mission_2.gif");
		newImage ("images/rescue_2.gif");
		newImage ("images/irs_2.gif");
		newImage ("images/contact_2.gif");
		newImage ("images/link_2.gif");

		preloadFlag = true;
}