var preloadFlag = true;
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 preloadImages() {
	if (document.images) {
		meeting_on = newImage("img/meeting_on.gif");
		//meeting_off = newImage("img/meeting_off.gif");
		preloadFlag = true;
	}
}