var checkdom = false;
var browsID = null;
var timerID = null;
var timeUp = false;
var countUp = 500;

function CheckDom() {
	if(document.getElementById) {
		accDom = "document.getElementByID";
		browsID = "Standard";
	}
	else if(document.all) {
		accDom = "document.all";
		browsID = "IE";
	}
	else if(document.layers) {
		accDom = "document.layers";
		browsID = "NS";
	}
	checkdom = true;
}
function ShowLayer(LayerID) {
	if(checkdom == true) {
		if (browsID == "Standard") {
			document.getElementById(LayerID).style.visibility="visible";
		}
		else if(browsID == "IE") {
			eval(accDom+'("'+LayerID+'").style.visibility="visible"');
		}
		else if(browsID == "NS") {
			eval(accDom+'["'+LayerID+'"].visibility="show"');
		}
	}
}
function HideLayer(LayerID) {
	if(checkdom == true) {
		if (browsID == "Standard") {
			document.getElementById(LayerID).style.visibility="hidden";
		}
		else if(browsID == "IE") {
			eval(accDom+'("'+LayerID+'").style.visibility="hidden"');
		}
		else if(browsID == "NS") {
			eval(accDom+'["'+LayerID+'"].visibility="hide"');
		}
	}
}
function Showwhy(){
	ShowLayer('subwhy'); HideLayer('subprod'); HideLayer('subpress');
}
function Showprod(){
	HideLayer('subwhy'); ShowLayer('subprod'); HideLayer('subpress');
}
function Showpress(){
	HideLayer('subwhy'); HideLayer('subprod'); ShowLayer('subpress');
}
function allHide(){
	HideLayer('subwhy'); HideLayer('subprod'); HideLayer('subpress');
}