function toggle_visibility(id) {
var e = document.getElementById(id);
if(e.style.display == 'none')
e.style.display = 'block';
else
e.style.display = 'none';
}

function checksub()
{
 var str = sub.email.value;
 var re = /^[A-Za-z0-9_\-]+([.][A-Za-z0-9_\-]+)*[@][A-Za-z0-9_\-]+([.][A-Za-z0-9_\-]+)+$/;
 if (!re.test(str))
 {
   window.alert('Invalid email address');
   sub.email.focus();
   return false;
 }
 return true;
}

ieHover = function() {
		var sfEls = document.getElementById("navmenu").getElementsByTagName("LI");
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" iehover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" iehover\\b"), "");
			}
		}
	}
if (window.attachEvent) window.attachEvent("onload", ieHover);