function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}
function changeImages() {
	changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_about_us_on_01 = newImage('nav_images/about_us_on_01.gif');
		pre_team_on_03 = newImage('nav_images/team_on_03.gif');
		pre_recruiters_on_02 = newImage('nav_images/recruiters_on_02.gif');
		pre_telephone_on_04 = newImage('nav_images/telephone_on_04.gif');
		pre_press_on_05 = newImage('nav_images/press_on_05.gif');
		pre_sister_co_on_06 = newImage('nav_images/sister_co_on_06.gif');
		pre_opportunities_on_07 = newImage('nav_images/opportunities_on_07.gif');
		pre_contact_on_08 = newImage('nav_images/contact_on_08.gif');
		preloadFlag = true;
	}
}
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}