function get_info(location,filename){
  new Ajax.Updater(location, filename,{
	method: "get",
	onException: function( response, exp){
	  alert( 'response: ' + typeof(response) +
		'\nexception: ' + exp +
		'\nfilename: ' + filename )
	},
	onFailure: function( response ){
	  alert( 'response: ' + response.responseText )
	}
  });
}