function preload_images() {
	i1=new Image();
	pi1=new Image(); pi1.src="/images/mmp.jpg";
	pi2=new Image(); pi2.src="/images/sbs.jpg";
	pi3=new Image(); pi3.src="/images/nev.jpg";
	pi4=new Image(); pi4.src="/images/pcc.jpg";
	pi5=new Image(); pi5.src="/images/ccc.jpg";
	pi6=new Image(); pi6.src="/images/cbp.jpg";
	pi7=new Image(); pi7.src="/images/lbs.jpg";
	pi8=new Image(); pi8.src="/images/sky.jpg";
	pi9=new Image(); pi9.src="/images/spd.jpg";
	pi10=new Image(); pi10.src="/images/elc.jpg";
	pi11=new Image(); pi11.src="/images/psl.jpg";
	pi12=new Image(); pi12.src="/images/amt.jpg";
	pi13=new Image(); pi13.src="/images/cou.jpg";
	pi14=new Image(); pi14.src="/images/wcc.jpg";
	pi15=new Image(); pi15.src="/images/cfc.jpg";
	pi16=new Image(); pi16.src="/images/ems.jpg";
	pi17=new Image(); pi17.src="/images/mrc.jpg";
	pi18=new Image(); pi18.src="/images/fox.jpg";

}

function ChangeText(id, bVis)
{
	var e = document.getElementById(id);
//	alert("id = "+id+", e = "+e);
	if (bVis)
		e.style.display = 'inline';
	else
		e.style.display = 'none';
}

function Clearall()
{
	ChangeText('desc_mmp',false);
	ChangeText('desc_sbs',false);
	ChangeText('desc_nev',false);
	ChangeText('desc_pcc',false);
	ChangeText('desc_ccc',false);
	ChangeText('desc_cbp',false);
	ChangeText('desc_lbs',false);
	ChangeText('desc_sky',false);
	ChangeText('desc_spd',false);
	ChangeText('desc_elc',false);
	ChangeText('desc_psl',false);
	ChangeText('desc_amt',false);
	ChangeText('desc_cou',false);
	ChangeText('desc_wcc',false);
	ChangeText('desc_cfc',false);
	ChangeText('desc_ems',false);
	ChangeText('desc_mrc',false);
	ChangeText('desc_fox',false);
}