var dom, ie4, elements;

dom = (document.getElementById)? true : false;
ie4 = (document.all && !dom)? true : false;
elements=new Array('labs','spares','fotlab');

function InitLayers()
{
 var i;

 for(i=0;i<elements.length;i++){
   if (dom) document.getElementById(elements[i]).style.display="none";
   if (ie4) document.all[elements[i]].style.display="none";
 }
}

function ShowHideLayer(elemId)
{
 if (dom){
     if (document.getElementById(elemId).style.display=="block")
         document.getElementById(elemId).style.display="none";
     else document.getElementById(elemId).style.display="block";

    // for(i=0;i<elements.length;i++)
    //     if(elemId!=elements[i])
    //        document.getElementById(elements[i]).style.display="none";
         }
 else if (ie4){
          if (document.all[elemId].style.display=="block")
              document.all[elemId].style.display="none";
          else document.all[elemId].style.display="block";

     //     for(i=0;i<elements.length;i++)
      //        if(elemId!=elements[i])
       //          document.all[elements[i]].style.display="none";
             }
 else alert('Your browser doesn\'t support changing of DISPLAY property for '+elemId)
}