//rollover javascript code for navigation tabs
//********************************************


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) 
		{
		home1_over = newImage("images/home2.gif");
		soft1_over = newImage("images/software2.gif");
		down1_over = newImage("images/download2.gif");
		plan1_over = newImage("images/planreview2.gif");
		eng1_over = newImage("images/engineering2.gif");
		link1_over = newImage("images/links2.gif");
		preloadFlag = true;
		}
	}