function iFrameHeight()
{
  //find the height of the internal page
  var h = document.getElementById('custFrame').contentWindow.document.body.scrollHeight;
//alert(h)
  //change the height of the iframe
    //FF 
    if (document.getElementById && !document.all){
        var hh=3*h;  
        document.getElementById('custFrame').height= hh;
    }
    //IE
    document.getElementById('custFrame').height= h;  
}