/**
 *Hash the password field.
 *@param form A DOM object. 
 */
 
function HashFormPasswords( form ){

  if( form ){
    
    for( var k = 0; k < form.childNodes.length > 0; k++){
      
      var element = form.childNodes.item(k);
      
      if( element.nodeName == 'INPUT'  ){
        
        if( element.type == 'password' ){
          
          element.value = hex_sha1( element.value );
        }
        
      }else{
        
        HashFormPasswords( element );
      }
    }
  }
  
  return true;
}