/*
<a href="page_name.html" onmouseover="roll('page_name',1);" onmouseout="roll('page_name');"><img src="images/global/nav/page_name_off.gif" title="Descriptive Text" alt="Descriptive Text" width="97" height="23" border="0" name="page_name" /></a>
*/

function roll(whichone, turnon)
	{
	var direction = ( turnon ) ? "_on" : "_off";
	var navElement = eval(whichone + direction + ".src");
	document.images[whichone].src = navElement;
	}

// preload top horiz nav.
if (document.images)
	{

	home_off = new Image();
	home_off.src = "images/global/nav/home_off.png";

	home_on = new Image();
	home_on.src = "images/global/nav/home_on.png";

	our_perspective_off = new Image();
	our_perspective_off.src = "images/global/nav/our_perspective_off.png";

	our_perspective_on = new Image();
	our_perspective_on.src = "images/global/nav/our_perspective_on.png";

	our_services_off = new Image();
	our_services_off.src = "images/global/nav/our_services_off.png";

	our_services_on = new Image();
	our_services_on.src = "images/global/nav/our_services_on.png";

	our_work_off = new Image();
	our_work_off.src = "images/global/nav/our_work_off.png";

	our_work_on = new Image();
	our_work_on.src = "images/global/nav/our_work_on.png";

	about_us_off = new Image();
	about_us_off.src = "images/global/nav/about_us_off.png";

	about_us_on = new Image();
	about_us_on.src = "images/global/nav/about_us_on.png";

	our_clients_off = new Image();
	our_clients_off.src = "images/global/nav/our_clients_off.png";

	our_clients_on = new Image();
	our_clients_on.src = "images/global/nav/our_clients_on.png";

	contact_us_off = new Image();
	contact_us_off.src = "images/global/nav/contact_us_off.png";

	contact_us_on = new Image();
	contact_us_on.src = "images/global/nav/contact_us_on.png";
	
	blog_off = new Image();
	blog_off.src = "images/global/nav/blog_off.png";
	
	blog_on = new Image();
	blog_on.src = "images/global/nav/blog_on.png";

	};