function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function SearchFormNoDisplay(){
	if (!document.getElementById) return false;
	if (!document.getElementById("page_search")) return false;
	if (!document.getElementById("nav")) return false;
	var targetdiv=document.getElementById("nav");
	var targetli = targetdiv.getElementsByTagName("li");
	for (var i=0; i<targetli.length; i++) {
		targetli[i].onmouseover = function() {
			var rsid = document.getElementById("page_search");
			rsid.style.visibility = 'hidden';
		}
		targetli[i].onmouseout = function() {
			var rsid = document.getElementById("page_search");
			rsid.style.visibility = 'visible';
		}
	}

}


addLoadEvent(SearchFormNoDisplay);