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) {
	    Home_over = newImage("images/HomeOver.gif");
	    Blue_over = newImage("images/Blue_01-over.gif");
	    Green_over = newImage("images/Green_01-over.gif");
	    Yellow_over = newImage("images/Yellow_01-over.gif");
	    Orange_over = newImage("images/Orange_01-over.gif");
	    Red_over = newImage("images/Red_01-over.gif");
	    preloadFlag = true;
	}
    }

    function openSmallWindow(url) {
      window.open(url,'','width=450,height=450,left=600,top=200,scrollbars=1,menubar=1,resizable=1');
    }

    function openMediumWindow(url) {
      window.open(url,'','width=700,height=500,left=600,top=200,scrollbars=1,menubar=1,resizable=1');
    }

    function openFlatWindow(url) {
      window.open(url,'_details','width=800,height=350,left=600,top=200,scrollbars=1,menubar=1,resizable=1');
    }