// IE hack //
function msieversion() {
      var ua = window.navigator.userAgent
      var msie = ua.indexOf ( "MSIE " )

      if ( msie > 0 )      // If Internet Explorer, return version number
         return parseInt (ua.substring (msie+5, ua.indexOf (".", msie )))
      else                 // If another browser, return 0
         return 0
}
function setMenu() {
	if (msieversion() > 0 && msieversion() <=  7) {
		var l = (document.body.offsetWidth - 980) / 2;
		document.all['menu'].style.left = l+1;
	}
}
// einde IE hack


function showSubmenu(id) {
	if (!document.getElementById(id)==false) document.getElementById(id).style.display = "block";
}
function hideSubmenu(id) {
	if (!document.getElementById(id)==false) document.getElementById(id).style.display = "none";
}
function slowhideSubmenu(id) {
	setTimeout("document.getElementById('"+id+"').style.display = \"none\"",500);
}