var t1,t2,t3,t4,t5,t6,t7;
	 
function changeto(mn,list,num)	{
	document.getElementById("topmn"+mn+"_"+list+num).src="/mod/images/nav/topmn"+mn+"_"+list+num+"_on.gif";
}

function changeback(mn,list,num)	{
	document.getElementById("topmn"+mn+"_"+list+num).src="/mod/images/nav/topmn"+mn+"_"+list+num+"_on.gif";
}

function make_visible(num)	{
	document.getElementById('submenu'+num).style.display="block";
}

function make_hidden(num,time) {
	if (num== 1) t1=setTimeout("document.getElementById('submenu1').style.display='none'",time)
	if (num== 2) t2=setTimeout("document.getElementById('submenu2').style.display='none'",time)
	if (num== 3) t3=setTimeout("document.getElementById('submenu3').style.display='none'",time)
	if (num== 4) t4=setTimeout("document.getElementById('submenu4').style.display='none'",time)
	if (num== 5) t5=setTimeout("document.getElementById('submenu5').style.display='none'",time)
	if (num== 6) t6=setTimeout("document.getElementById('submenu6').style.display='none'",time)
	if (num== 7) t7=setTimeout("document.getElementById('submenu7').style.display='none'",time)
}