common.js

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/*
	[Discuz!] (C)2001-2007 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$RCSfile: common.js,v $
	$Revision: 1.103 $
	$Date: 2007/07/30 09:16:52 $
*/

var lang = new Array();
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_moz = (navigator.product == 'Gecko') && userAgent.substr(userAgent.indexOf('firefox') + 8, 3);
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);

function $(id) {
	return document.getElementById(id);
}

Array.prototype.push = function(value) {
	this[this.length] = value;
	return this.length;
}



function doane(event) {
	e = event ? event : window.event;
	if(is_ie) {
		e.returnValue = false;
		e.cancelBubble = true;
	} else if(e) {
		e.stopPropagation();
		e.preventDefault();
	}
}



function isUndefined(variable) {
	return typeof variable == 'undefined' ? true : false;
}