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) {
		profile_over = newImage("/img/nav/profile-over.gif");
		hand_tools_over = newImage("/img/nav/hand_tools-over.gif");
		contact_over = newImage("/img/nav/contact-over.gif");
		blk_blt = newImage("/img/b_blt.gif");
		preloadFlag = true;
	}
}

function swapblt(blt, state)
{
	var bltobj = document.getElementById(blt);
	if(state=='over')
	{
		bltobj.src='/img/b_blt.gif';
	}
	else if(state=='out')
	{
		bltobj.src='/img/w_blt.gif';
	}
}