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

	$RCSfile: common.js,v $
	$Revision: 1.101 $
	$Date: 2007/07/20 14:05:09 $
*/

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);

//FixPrototypeForGecko
if(is_moz && window.HTMLElement) {
	HTMLElement.prototype.__defineSetter__('outerHTML', function(sHTML) {
        	var r = this.ownerDocument.createRange();
		r.setStartBefore(this);
		var df = r.createContextualFragment(sHTML);
		this.parentNode.replaceChild(df,this);
		return sHTML;
	});

	HTMLElement.prototype.__defineGetter__('outerHTML', function() {
		var attr;
		var attrs = this.attributes;
		var str = '<' + this.tagName.toLowerCase();
		for(var i = 0;i < attrs.length;i++){
			attr = attrs[i];
			if(attr.specified)
			str += ' ' + attr.name + '="' + attr.value + '"';
		}
		if(!this.canHaveChildren) {
			return str + '>';
		}
		return str + '>' + this.innerHTML + '</' + this.tagName.toLowerCase() + '>';
        });

	HTMLElement.prototype.__defineGetter__('canHaveChildren', function() {
		switch(this.tagName.toLowerCase()) {
			case 'area':case 'base':case 'basefont':case 'col':case 'frame':case 'hr':case 'img':case 'br':case 'input':case 'isindex':case 'link':case 'meta':case 'param':
			return false;
        	}
		return true;
	});
	HTMLElement.prototype.click = function(){
		var evt = this.ownerDocument.createEvent('MouseEvents');
		evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
		this.dispatchEvent(evt);
	}
}

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

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

function checkall(form, prefix, checkall) {
	var checkall = checkall ? checkall : 'chkall';
	for(var i = 0; i < form.elements.length; i++) {
		var e = form.elements[i];
		if(e.name && e.name != checkall && (!prefix || (prefix && e.name.match(prefix)))) {
			e.checked = form.elements[checkall].checked;
		}
	}
}

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 fetchCheckbox(cbn) {
	return $(cbn) && $(cbn).checked == true ? 1 : 0;
}

function getcookie(name) {
	var cookie_start = document.cookie.indexOf(name);
	var cookie_end = document.cookie.indexOf(";", cookie_start);
	return cookie_start == -1 ? '' : unescape(document.cookie.substring(cookie_start + name.length + 1, (cookie_end > cookie_start ? cookie_end : document.cookie.length)));
}

imggroup = new Array();
function thumbImg(obj, method) {
	if(!obj) {
		return;
	}
	obj.onload = null;
	file = obj.src;
	zw = obj.offsetWidth;
	zh = obj.offsetHeight;
	if(!zw) {
		if(!obj.id) {
			obj.id = 'img_' + Math.random();
		}
		setTimeout("thumbImg($('" + obj.id + "'), " + method + ")", 100);
		return;
	}
	zr = zw / zh;
	method = !method ? 0 : 1;
	if(method) {
		fixw = obj.getAttribute('_width');
		fixh = obj.getAttribute('_height');
		if(zw > fixw) {
			zw = fixw;
			zh = zw / zr;
		}
		if(zh > fixh) {
			zh = fixh;
			zw = zh * zr;
		}
	} else {
		fixw = !imagemaxwidth ? 600 : imagemaxwidth;
		if(zw > fixw) {
			zw = fixw;
			zh = zw / zr;
			obj.style.cursor = 'pointer';
			if(!obj.onclick) {
				obj.onclick = function() {
					zoom(obj, obj.src);
				}
			}
		}
	}
	obj.width = zw;
	obj.height = zh;
}

function imgzoom() {}
function attachimg() {}

function in_array(needle, haystack) {
	if(typeof needle == 'string' || typeof needle == 'number') {
		for(var i in haystack) {
			if(haystack[i] == needle) {
					return true;
			}
		}
	}
	return false;
}

function setcopy(text, alertmsg){
	if(is_ie) {
		clipboardData.setData('Text', text);
		alert(alertmsg);
	} else if(prompt('Press Ctrl+C Copy to Clipboard', text)) {
		alert(alertmsg);
	}
}

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

function mb_strlen(str) {
	var len = 0;
	for(var i = 0; i < str.length; i++) {
		len += str.charCodeAt(i) < 0 || str.charCodeAt(i) > 255 ? (/*charset == 'utf-8' ? 3 : 2*/3) : 1;
	}
	return len;
}

function setcookie(cookieName, cookieValue, seconds, path, domain, secure) {
	var expires = new Date();
	expires.setTime(expires.getTime() + seconds);
	document.cookie = escape(cookieName) + '=' + escape(cookieValue)
		+ (expires ? '; expires=' + expires.toLocaleString() : '')
		+ (path ? '; path=' + path : '/')
		+ (domain ? '; domain=' + domain : '')
		+ (secure ? '; secure' : '');
}

function strlen(str) {
	return (is_ie && str.indexOf('\n') != -1) ? str.replace(/\r?\n/g, '_').length : str.length;
}

function updatestring(str1, str2, clear) {
	str2 = '_' + str2 + '_';
	return clear ? str1.replace(str2, '') : (str1.indexOf(str2) == -1 ? str1 + str2 : str1);
}

function toggle_collapse(objname, noimg) {
	var obj = $(objname);
	obj.style.display = obj.style.display == '' ? 'none' : '';
	if(!noimg) {
		var img = $(objname + '_img');
		img.src = img.src.indexOf('_yes.gif') == -1 ? img.src.replace(/_no\.gif/, '_yes\.gif') : img.src.replace(/_yes\.gif/, '_no\.gif')
	}
	var collapsed = getcookie('discuz_collapse');
	collapsed =  updatestring(collapsed, objname, !obj.style.display);
	setcookie('discuz_collapse', collapsed, (collapsed ? 86400 * 30 : -(86400 * 30 * 1000)));
}

function trim(str) {
	return (str + '').replace(/(\s+)$/g, '').replace(/^\s+/g, '');
}

/*
function updateseccode() {
	type = seccodedata[2];
	var rand = Math.random();
	if(type < 2) {
		$('seccodeimage').innerHTML = '<img id="seccode" onclick="updateseccode()" width="' + seccodedata[0] + '" height="' + seccodedata[1] + '" src="seccode.php?update=' + rand + '" class="absmiddle" alt="" />';
	} else {
		$('seccodeimage').innerHTML = '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="' + seccodedata[0] + '" height="' + seccodedata[1] + '" align="middle">'
			+ '<param name="allowScriptAccess" value="sameDomain" /><param name="movie" value="seccode.php?update=' + rand + '" /><param name="quality" value="high" /><param name="wmode" value="transparent" /><param name="bgcolor" value="#ffffff" />'
			+ '<embed src="seccode.php?update=' + rand + '" quality="high" wmode="transparent" bgcolor="#ffffff" width="' + seccodedata[0] + '" height="' + seccodedata[1] + '" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object>';
	}
}

function updatesecqaa() {
	var x = new Ajax();
	x.get('ajax.php?action=updatesecqaa&inajax=1', function(s) {
		$('secquestion').innerHTML = s;
	});
}
*/

function _attachEvent(obj, evt, func) {
	if(obj.addEventListener) {
		obj.addEventListener(evt, func, false);
	} else if(obj.attachEvent) {
		obj.attachEvent("on" + evt, func);
	}
}
/*Discuz!NT*/
function scrollHiddenDiv(div, scrollwidth)
{
	div.scrollLeft += scrollwidth;
}

function findtags(parentobj, tag) {
	if(!isUndefined(parentobj.getElementsByTagName)) {
		return parentobj.getElementsByTagName(tag);
	} else if(parentobj.all && parentobj.all.tags) {
		return parentobj.all.tags(tag);
	} else {
		return null;
	}
}

function getQueryString(queryname) {
    var qKeys = {};
    var re = /[?&]([^=]+)(?:=([^&]*))?/g;
    var matchInfo;
    while(matchInfo = re.exec(location.search)){
	    qKeys[matchInfo[1]] = matchInfo[2];
    }
    return typeof(qKeys[queryname])=='undefined'?'':qKeys[queryname];
}

function getUserid()
{
	// cookies are separated by semicolons
	var aCookie = document.cookie.split("; ");
	for (var i=0; i < aCookie.length; i++)
	{
		// a name alue pair (a crumb) is separated by an equal sign
		var aCrumb = aCookie[i].split("=");
		for(var j = 0; j < aCrumb.length; j++)
		{
			if ("userid" == aCrumb[j])
			{
				return aCrumb[j+1].split("&")[0];
			}
		}
	}
	// a cookie with the requested name does not exist
	return null;
}