sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);
		
		function goback(){
			history.go(-1);
		}
		function openWindow(url, name, attributes)
		{
    		var n = window.open (url, name, attributes);
		}
if (document.all && window.attachEvent) window.attachEvent("onload", fixWinIE);
function fixWinIE() {
        if (document.body.scrollHeight < document.all.content.offsetheight) {
                document.all.content.style.display = 'block';
	}
}

function checkform ( form )
{
    if (form.conference.value == "No conference selected") {
    alert( "Please select your conference" );
    form.conference.focus();
    return false ;
  }
  return true ;
}