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];
		}
	}
}

function openwinrandWH(inURL,inW,inH, inOn) {
	var inTitle = "win" + Math.round(Math.random()*1000);
	var thefeatures;
	if (inOn == null) inOn = 1;
	if (inOn == 1) {
		thefeatures = "scrollbars,menubar,toolbar,location,status,resizable,width=" + inW +",height=" + inH;
	} else {
		thefeatures = "scrollbars,resizable,width=" + inW +",height=" + inH;
	}
	var mwin = window.open(inURL,inTitle,thefeatures);
	if (mwin != null) {
		mwin.focus();
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		preload_01 = newImage("images/navtab_home_over.gif");
		preload_02 = newImage("images/navtab_gallery_over.gif");
		preload_03 = newImage("images/navtab_features_over.gif");
		preload_04 = newImage("images/navtab_getstarted_over.gif");
		preload_05 = newImage("images/navtab_forstud_over.gif");
		preload_06 = newImage("images/navtab_forinst_over.gif");
		preload_07 = newImage("images/navtab_help_over.gif");
		preload_08 = newImage("images/main_btn_01_over.gif");
		preload_09 = newImage("images/main_btn_02_over.gif");
		preload_10 = newImage("images/main_btn_03_over.gif");
		preload_11 = newImage("images/main_btn_04_over.gif");
		preload_12 = newImage("images/navtab_cclogin_over.gif");
		preload_13 = newImage("images/student_btn_01_over.gif");
		preload_14 = newImage("images/student_btn_02_over.gif");
		preload_15 = newImage("images/student_btn_03_over.gif");
		preload_16 = newImage("images/student_btn_04_over.gif");
		preload_17 = newImage("images/inst_btn_01_over.gif");
		preload_18 = newImage("images/inst_btn_02_over.gif");
		preload_19 = newImage("images/inst_btn_03_over.gif");
		preload_20 = newImage("images/inst_btn_04_over.gif");
		preload_21 = newImage("images/gallery/catalog_btn_over.gif");
		preload_22 = newImage("images/gallery/demo_btn_over.gif");
		preload_23 = newImage("images/gallery/search_btn_over.gif");
		preload_24 = newImage("images/gallery/viewall_btn_over.gif");
		preload_25 = newImage("images/gallery/walkthrough_btn_over.gif");
		preload_26 = newImage("images/getstarted_cc_btn_over.gif");
		preload_27 = newImage("images/getstarted_bb_btn_over.gif");
		preload_28 = newImage("images/getstarted_ct_btn_over.gif");
		preloadFlag = true;
	}
}