// JavaScript Document

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) {
		btnHome_normal_over = newImage("images/btnHomeOver.jpg");
		preloadFlag = true;
	}
	
	if (document.images) {
		btnJoin_normal_over = newImage("images/btnJoinOver.jpg");
		preloadFlag = true;
	}

	if (document.images) {
		btnSearch_normal_over = newImage("images/btnSearchOver.jpg");
		preloadFlag = true;
	}
	
	if (document.images) {
		btnPhyServ_normal_over = newImage("images/btnPhyServOver.jpg");
		preloadFlag = true;
	}
	
	if (document.images) {
		btnMemServ_normal_over = newImage("images/btnMemServOver.jpg");
		preloadFlag = true;
	}
}