/**
* Add an event handler function to an object
*
* @param {Object} The object
* @param {String} The event name to listen for, eg "load", "unload", "mousedown"
* @param {Function} The function to call on the event
*/
function addEventHandler( targetObject, eventType, handlerFunc ) {
if( targetObject.addEventListener ) {
targetObject.addEventListener( eventType, handlerFunc, true );
} else if( targetObject.attachEvent ) {
targetObject.attachEvent( 'on' + eventType, handlerFunc );
}
}
/**
* Request XML from the server by GET or POST
*
* @param {String} Relative URL to call
* @param {Function} Callback function to recieve data on success
* @param {String} Type of request - GET or POST
* @param {String} Data to send to the server
*/
function requestXml( url, callback, type, data ) {
var client = new XMLHttpRequest();
type = ( type ) ? type : 'GET';
data = ( data ) ? encodeURI( data ) : null;
url += ( ( url.indexOf( '?' ) != -1 ) ? '&' : '?' ) + '&rand=' + Math.random();
if( typeof( callback ) == "function" ) {
client.onreadystatechange = function() {
if( client.readyState == 4 ) {
callback( client.responseXML );
}
}
}
client.open( type, url, true );
client.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );
client.send( data );
}
/**
* Open a popup window with a fixed width and height
* Places new windows in the centre of the screen
*
* @param {String} The URL
* @param {Number} Window width
* @param {Number} Window height
*/
function openPopupWindow( windowName, windowUrl, windowWidth, windowHeight ) {
var windowTop = ( screen.height / 2 ) - ( windowHeight / 2 );
var windowLeft = ( screen.width / 2 ) - ( windowWidth / 2 );
var features = 'height=' + windowHeight + ',width=' + windowWidth + ',top=' + windowTop + ',left=' + windowLeft + ',scrollbars=yes,resizable=yes';
return window.open( windowUrl, windowName, features );
}
/**
* Open a new window which will resize to fit the image specified by windowUrl
*
* @param {String} windowUrl
*/
function openPhotoWindow( windowUrl, windowTitle ) {
var htm = '' +
'' +
'' + windowTitle + '' +
'' +
'' +
'' +
'' +
'' +
'' +
'' +
'' +
'' +
'';
var photoWin = openPopupWindow( "photoWin", "", 150, 150 );
photoWin.focus();
photoWin.document.write( htm );
photoWin.document.close();
}
function getElementsByClassName( needle ) {
var my_array = document.getElementsByTagName( "*" );
var retvalue = new Array();
var i;
for (i = 0; i < my_array.length; i++) {
var c = " " + my_array[ i ].className + " ";
if( c.indexOf(" " + needle + " ") != -1 ) {
retvalue[ retvalue.length ] = my_array[ i ];
}
}
return retvalue;
}