var preloadFlag = false;

function preloadImages() {
	if (document.images) {

		b12 = newImage("1o.gif");
		b22 = newImage("2o.gif");
		b32 = newImage("3o.gif");
		b42 = newImage("4o.gif");
		b52 = newImage("5o.gif");
		b62 = newImage("6o.gif");
		b72 = newImage("7o.gif");
		b82 = newImage("8o.gif");
		b92 = newImage("9o.gif");

												
		preloadFlag = true;
	}
} 

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

function OpenWindow(TheURL,WinName,Features) {
	// options : toolbar=yes,location=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=150,height=100
	window.open(TheURL,WinName,Features);
}