function callback_hide_error ( error_div_id )
{
	if ( typeof error_div_id == 'undefined' ||  error_div_id == '' )
	{
		alert ( "Developer's Error:  You must pass an error_div_id into callback_hide_error.js" );
	}
	
	$(error_div_id).innerHTML = '';
	$(error_div_id).style.display = 'none';
}