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) {
		contact_us_over = newImage("images/contact-us-over.gif");
		onlinestore_over = newImage("images/onlinestore-over.gif");
		AD_login_over = newImage("images/AD-login-over.gif");
		subcontact_us_over = newImage("images/subcontact-us-over.gif");
		subonlinestore_over = newImage("images/subonlinestore-over.gif");
		subAD_login_over = newImage("images/subAD-login-over.gif");
		subhome_over = newImage("images/subhome-over.gif");

//		NAVAboutUS_off_over = newImage("images/NAVAboutUS_off-over.jpg");
//		NAVourcoffee_off_over = newImage("images/NAVourcoffee_off-over.jpg");
//		NAVbusop_off_over = newImage("images/NAVbusop_off-over.jpg");
//		NAVLandlord_off_over = newImage("images/NAVLandlord_off-over.jpg");
//		NAVpress_off_over = newImage("images/NAVpress_off-over.jpg");
//		NAVsuccess_off_over = newImage("images/NAVsuccess_off-over.jpg");
		preloadFlag = true;
	}
}


function getElementsByClassName(node, classname)
{
    var a = new Array;
    var re = new RegExp('\\b' + classname + '\\b');
    var els = node.getElementsByTagName("*");
    for(var i=0,j=els.length; i<j; i++)
        if(re.test(els[i].className))a.push(els[i]);
    return a;
}

function initializeLeftNav()
{
	var leftNavItems = getElementsByClassName(document.getElementById('leftNavElements'),'leftNavItem');

	for (var i = 0; i < leftNavItems.length; i++)
	{
		if(leftNavItems[i].addEventListener)
		{
	
			leftNavItems[i].addEventListener('mouseover',function (e) {
				this.className = 'leftNavItemOver';
			},true);

			leftNavItems[i].addEventListener('mouseout',function (e) {
				this.className = 'leftNavItem';
			},true);
		}
		else if(leftNavItems[i].attachEvent)
		{
			leftNavItems[i].attachEvent('onmouseover', function(e){
				e.srcElement.className = 'leftNavItemOver';
			});

			leftNavItems[i].attachEvent('onmouseout', function(e){
				e.srcElement.className = 'leftNavItem';
			});
		}
	}
}