function vis(id) {

 id='block' + id;
/*
	if(document.all[id].style.display == 'none') {
		document.all[id].style.display = 'block';
	}
	else
		document.all[id].style.display = 'none';
*/	
	if(document.getElementById(id).style.display == 'none') {
		document.getElementById(id).style.display = 'block';
	}
	else
		document.getElementById(id).style.display = 'none';
	//alert(elem.style.display);
}

menu1_off=new Image();
menu1_off.src="/images/menu1.gif";
menu1_on=new Image();
menu1_on.src="/images/menu1on.gif";

menu2_off=new Image();
menu2_off.src="/images/menu2.gif";
menu2_on=new Image();
menu2_on.src="/images/menu2on.gif";

menu3_off=new Image();
menu3_off.src="/images/menu3.gif";
menu3_on=new Image();
menu3_on.src="/images/menu3on.gif";

menu4_off=new Image();
menu4_off.src="/images/menu4.gif";
menu4_on=new Image();
menu4_on.src="/images/menu4on.gif";

menu5_off=new Image();
menu5_off.src="/images/menu5.gif";
menu5_on=new Image();
menu5_on.src="/images/menu5on.gif";

function change(imgname,state)
{
	document.images[imgname].src=eval(imgname+"_"+state).src;
}