/*
	name			: ClassBehaviours, the javascript framework based on class-name parsing
	update			: 9.3.17
	author			: Maurice van Creij
	dependencies	: jquery.classbehaviours.js
	info			: http://www.classbehaviours.com/

    This file is part of jQuery.classBehaviours.
    
    ClassBehaviours is a javascript framework based on class-name parsing.
    Copyright (C) 2008  Maurice van Creij

    ClassBehaviours is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    ClassBehaviours is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with ClassBehaviours. If not, see http://www.gnu.org/licenses/gpl.html.
*/

	// create the jQuery object if it doesn't already exist
	if(typeof(jQuery)=='undefined') jQuery = function(){};
	
	// create the root classbehaviours object if it doesn't already exist
	if(typeof(jQuery.classBehaviours)=='undefined') jQuery.classBehaviours = function(){};
	
	// create the handlers child object if it doesn't already exist
	if(typeof(jQuery.classBehaviours.handlers)=='undefined') jQuery.classBehaviours.handlers = function(){}

	// Filter the contents of a table based on a keyword
	jQuery.classBehaviours.handlers.maxLength = {
		// properties
		name: 'maxLength',
		// methods
		start: function(node){
			// set the event handlers of this element
			node.onkeydown = this.restrict;
			node.onkeyup = this.restrict;
			node.onchange = this.restrict;
			// initial value
			this.restrict(node);
		},
		// events
		restrict: function(that){
			var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
			// get the limit value
			lengthLimit = parseInt(jQuery.classBehaviours.utilities.getClassParameter(objNode, 'max', '140'));
			// get the output indicator
			outputIndicator = jQuery.classBehaviours.utilities.getClassParameter(objNode, 'id', null);
			// refuse new input if the limit is reached
			keyPress = (typeof(event)!='undefined')? event.keyCode : that.which ;
			if(objNode.value.length==lengthLimit+1 && keyPress!=8 && keyPress!=46) return false;
			// measure the length of the content
			if(objNode.value.length>lengthLimit) objNode.value = objNode.value.substring(0, lengthLimit);
			// update the indicator
			if(outputIndicator!=null) document.getElementById(outputIndicator).innerHTML = lengthLimit - objNode.value.length;
		}
	}
			
	// add this addon to the jQuery object
	if(typeof(jQuery.fn)!='undefined'){
		// extend jQuery with this method
		jQuery.fn.maxLength = function(){
			return this.each(
				function(){
					jQuery.classBehaviours.handlers.maxLength.start(this);
				}
			);
		};
		// set the event handler for this jQuery method
		$(document).ready(
			function(){
				$(".maxLength").maxLength();
			}
		);
	}