// Protect script from older browsers
	/***********************************************
	*
	* ExtractValue	- extract the value from a drop-down box
	*
	* Params:	cmbBox	- combo box
	*
	* Returns:	Extracted value or an empty string
	*
	***********************************************/

	function ExtractValue(cmbBox)
	   {
	   if (cmbBox.selectedIndex < 0)	// No value
	      {
	      return("");
	      }
	   return(cmbBox.options[cmbBox.selectedIndex].value);
	   }