var oTimeout
	
	function showDiv(szDivID) {
		clearDivs();
		document.getElementById(szDivID).style.display = "block";
	}
	
	function clearDivs() {
		document.getElementById('sub_about').style.display = "none";
		document.getElementById('sub_services').style.display = "none";
		document.getElementById('sub_sustainability').style.display = "none";
		document.getElementById('sub_casestudies').style.display = "none";
		document.getElementById('sub_clientlogin').style.display = "none";
		document.getElementById('sub_contact').style.display = "none";
	}	
	
	function hideDiv(szDivID) {
		oTimeout = setTimeout("document.getElementById('" + szDivID + "').style.display = 'none';",1000)
	}
	
	function showDefaultDiv() {
		document.getElementById(szDefaultDiv).style.display = "block";
	}
	
	function clearTimer() {
		clearTimeout(oTimeout);
	}	
	
	function swapImg(szSrc,szImgID) {
		document.getElementById(szImgID).src = szSrc;
	}