function op(obj) { 
x=document.getElementById(obj); 
if(x.style.display == "none") x.style.display = "block"; 
else x.style.display = "none" 
}

function show(x){
    var els = document.getElementById(x).style;
    els.display = (els.display == 'none' ? '' : 'none');
}

function showhide(id1)
{
if (document.getElementById(id1).style.width == "1px")

{
document.getElementById(id1).style.width = "200px";
document.getElementById(id1).style.visibility = "visible";
}
else
{
  document.getElementById(id1).style.width = "1px";
  document.getElementById(id1).style.visibility = "hidden";
  }
}


    function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }