function ShowHide(thisdiv) { 
if (document.all) 
{ 
document.all(thisdiv).style.display=document.all(thisdiv).style.display=='none'?"block":"none"; 
} 
else 
{ 
document.getElementById(thisdiv).style.display=document.getElementById(thisdiv).style.display=='none'?"block":"none"; 
} 
}