function showTool(obj,popObj){
   var oTool=document.getElementById(obj);
   var oToolUl=document.getElementById(popObj);
   if(document.all){//ie
    oTool.setAttribute("onmouseover",eval(function(){oToolUl.style.display="block";}));
    oTool.setAttribute("onmouseout",eval(function(){oToolUl.style.display="none";}));
    oToolUl.setAttribute("onmouseover",eval(function(){oToolUl.style.display="block";}));
    oToolUl.setAttribute("onmouseout",eval(function(){oToolUl.style.display="none";}));
   }else{//ff
    oTool.addEventListener("mouseover", function(){oToolUl.style.display="block";}, false);
    oTool.addEventListener("mouseout", function(){oToolUl.style.display="none";}, false);
    oToolUl.addEventListener("mouseover", function(){oToolUl.style.display="block";}, false);
    oToolUl.addEventListener("mouseout", function(){oToolUl.style.display="none";}, false);
   }
  }

showTool("toolTip", "tip");