activateMenu = function(nav) {

	if (document.all && document.getElementById(nav).currentStyle) {  
        var navroot = document.getElementById(nav);
        
        var baseUL = navroot.getElementsByTagName("UL");
        var lis = baseUL[0].getElementsByTagName("LI");  
        for (i=0; i<lis.length; i++) {
        
            if(lis[i].lastChild.tagName=="UL"){
            
             	lis[i].onmouseover=function(){
                   this.lastChild.style.display="block";
                }

                lis[i].onmouseout=function(){
                   this.lastChild.style.display="none";
                }
            }
        }
    }
}

window.onload = function(){
    activateMenu('TopNav'); 
}

//Clear search box value if default value.
function clearSearchValue(control, defaultTextValue) {
    if (control != null) {
        if (control.value == defaultTextValue) {
            control.value = "";
        }
    }
}

//Toggles show/hide on an HTML element that supports display:none.
function ShowHideElement(obj) {
   if (obj != null) {
      if (obj.style.display.length == 0)
         obj.style.display = "none";
      else
         obj.style.display = "";
   }
}