function hide(div) {
       
  if (document.getElementById)
     document.poppedLayer = eval('document.getElementById(div)');
  else if (document.all)
     document.poppedLayer = eval('document.all[div]');
  else
     document.poppedLayer = eval('document.layers[div]');
     document.poppedLayer.style.display = "none";
}


function show(div) {
  if (document.getElementById)
     document.poppedLayer = eval('document.getElementById(div)');
  else if (document.all)
     document.poppedLayer = eval('document.all[div]');
  else
     document.poppedLayer = eval('document.layers[div]');
     document.poppedLayer.style.display = "block";
}

var cur=null;
var prev=null;
function showHideDiv(divID)
{
    cur= document.getElementById(divID);
    if (prev!=null && prev != cur)
    {
        prev.style.display='none';
    }    
    if (cur.style.display=='block')
    {
        cur.style.display='none';
    }
    else
    {
        cur.style.display='block';
    }
    prev = cur;
}