Enabled/Disable HTML Elements

function EnableDisabled(elName)
{
    var el = document.getElementById(elName);
    if(el){     
     try {el.disabled = el.disabled ? false : true;}
     catch(ex){}

     if (el.childNodes && el.childNodes.length > 0) 
     {
        for (var x = 0; x < el.childNodes.length; x++) 
        {
          EnableDisabled(el.childNodes[x]);
        }
     }
    }
}