if(document.images !=null){preload()}

function preload() {

	nav01 = new Image();

	nav01.src = "images/nav_who.gif";

	nav02 = new Image();

	nav02.src = "images/nav_do.gif";

	nav03 = new Image();

	nav03.src = "images/nav_how.gif";

	nav04 = new Image();

	nav04.src = "images/nav_what.gif";

	nav05 = new Image();

	nav05.src = "images/nav_questions.gif";

	nav06 = new Image();

	nav06.src = "images/nav_contact.gif";

    nav33 = new Image();

	nav33.src = "images/nav_login.gif";

    nav34 = new Image();

	nav34.src = "images/nav_employment.gif";
	
    nav10 = new Image();

	nav10.src = "images/donav_web.gif";
	
	nav11 = new Image();

	nav11.src = "images/donav_multimedia.gif";
	
	nav12 = new Image();

	nav12.src = "images/donav_identity.gif";
	
	nav13 = new Image();

	nav13.src = "images/donav_print.gif";
	
	nav14 = new Image();

	nav14.src = "images/donav_marketing.gif";
	
	nav15 = new Image();

	nav15.src = "images/donav_maintenance.gif";
	
	nav16 = new Image();

	nav16.src = "images/donav_hosting.gif";
	
	nav17 = new Image();

	nav17.src = "images/donav_training.gif";
	
		
	nav01on = new Image();

	nav01on.src = "images/nav_who_on.gif";

	nav02on = new Image();

	nav02on.src = "images/nav_do_on.gif";

	nav03on = new Image();

	nav03on.src = "images/nav_how_on.gif";

	nav04on = new Image();

	nav04on.src = "images/nav_what_on.gif";

	nav05on = new Image();

	nav05on.src = "images/nav_questions_on.gif";

	nav06on= new Image();

	nav06on.src = "images/nav_contact_on.gif";
	
	nav33on = new Image();

	nav33on.src = "images/nav_login_on.gif";

    nav34on = new Image();

	nav34on.src = "images/nav_employment_on.gif";

    nav10on = new Image();

	nav10on.src = "images/donav_web_on.gif";
	
	nav11on = new Image();

	nav11on.src = "images/donav_multimedia_on.gif";
	
	nav12on = new Image();

	nav12on.src = "images/donav_identity_on.gif";
	
	nav13on = new Image();

	nav13on.src = "images/donav_print_on.gif";
	
	nav14on= new Image();

	nav14on.src = "images/donav_marketing_on.gif";
	
	nav15on = new Image();

	nav15on.src = "images/donav_maintenance_on.gif";
	
	nav16on = new Image();

	nav16on.src = "images/donav_hosting_on.gif";

    nav17on = new Image();

	nav17on.src = "images/donav_training_on.gif";


}

function switchImages(title, title_name){

	if(document.images != null){

		var titleOn = (title.length == 7);

		title = eval(title + ".src");

		document[title_name].src = title;

		title = title_name + "_arrow";

		

	}

}