function clearDefault(xField) {
  if (xField.defaultValue==xField.value) xField.value = ""
}

	function checkUncheckAll(xField) {
     var theForm = xField.form, z = 0;
	 for(z=0; z<theForm.length;z++)
	 {
      if(theForm[z].type == 'checkbox' && theForm[z].name != 'checkall')
      {
	  theForm[z].checked = xField.checked;
	  }
	  }
	  }