function show(ID) {
divID = ID;
if (document.layers && document.layers[divID] != null)
document.layers[divID].visibility = 'visible';
else if (document.all)
document.all[divID].style.visibility = 'visible';
else if (document.getElementByID)
document.getElementById(''+divID+'').innerHTML=html
document.getElementById(''+divID+'').style.visibility = 'visible';
}
function hide(ID) {
divID = ID;
if (document.layers && document.layers[divID] != null)
document.layers[divID].visibility = 'hidden';
else if (document.all)
document.all[divID].style.visibility = 'hidden'; 
else if (document.getElementById)
document.getElementById(''+divID+'').style.visibility = 'hidden';
}

function KeepAlive(number) {
if (this.clear) clearTimeout(this.clear);  
this.clear = null;
}

function timeOut(number,length,swapNav) {
 this.start = new Date();
 this.clear = setTimeout("hide('"+number+"')", length*25);
}

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) {
	 	  homeover = newImage("images/vision_button_movr.gif");
          visionover = newImage("images/vision_button_movr.gif");
          servicesover = newImage("images/services_button_movr.gif");
          approachover = newImage("images/approach_button_movr.gif");
          aboutover = newImage("images/about_button_movr.gif");
		  resources = newImage("images/resources_button_movr.gif");
		  contactover = newImage("images/contact_button_movr.gif");
		  preloadFlag = true;
     }
}

function newImage(arg) {
     if (document.images) {
          rslt = new Image();
          rslt.src = arg;
          return rslt;
     }
}