function selImg(idx)
{
	document.getElementById('mnu'+idx).src = eval('mnu'+idx+'_sel.src');
}

function unSelImg(idx)
{
	document.getElementById('mnu'+idx).src = eval('mnu'+idx+'_unsel.src');
}

var mnu1_sel;
var mnu2_sel;
var mnu3_sel;
var mnu4_sel;
var mnu1_unsel;
var mnu2_unsel;
var mnu3_unsel;
var mnu4_unsel;

function preloadImages() 
{
	if (document.images) 
	{
		mnu1_sel = newImage('media/mnu_1_sel.gif');
		mnu2_sel = newImage('media/mnu_2_sel.gif');
		mnu3_sel = newImage('media/mnu_3_sel.gif');
		mnu4_sel = newImage('media/mnu_4_sel.gif');
		mnu1_unsel = newImage('media/mnu_1_unsel.gif');
		mnu2_unsel = newImage('media/mnu_2_unsel.gif');
		mnu3_unsel = newImage('media/mnu_3_unsel.gif');
		mnu4_unsel = newImage('media/mnu_4_unsel.gif');
	}
}

function newImage(arg) 
{
	if (document.images) 
	{
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}