var isNS4 = false;
var isIE3 = false;
var isGood = false;
var isOP = false;
var wmn='-1';
var mouseIsOver = false;
var autoHide = false;
var colsDefine = "";

function switchAutoHide()
{
	autoHide = !autoHide;
	document.getElementById('autoHideDiv').innerHTML = autoHide ? "停止自动隐藏" : "激活自动隐藏";
}

function doMouseOver()
{
	mouseIsOver = true;
	if (autoHide) doShowLeft();
}

function doMouseOut()
{
	mouseIsOver = false;
	if (autoHide) setTimeout("doHideLeft()", 2000);
}

function doHideLeft()
{
	if (!mouseIsOver && autoHide) {
		top.document.getElementById('mainframe').cols = '14,*';
	}
}

function doShowLeft()
{
	top.document.getElementById('mainframe').cols = colsDefine;
}

function Is() {
	agent = navigator.userAgent.toLowerCase();
	this.major = parseInt(navigator.appVersion);
	this.ns = ((agent.indexOf('mozilla') != -1) && ((agent.indexOf('spoofer') == -1) && (agent.indexOf('compatible') == -1)));
	this.ns4 = (this.ns && (this.major == 4));
	this.ie = (agent.indexOf("msie") != -1);
	this.ie3 = (this.ie && (this.major < 4));
	this.op	 = (agent.indexOf("opera") != -1);
	if(this.ie3) {
		isIE3 = true;
	} else if(this.ns4) {
		isNS4 = true;
	} else if(this.op && (agent.indexOf("opera 7")==-1)) {
		isOP = true;
	} else {
		isGood = true;
	}
}

function arrangeO() {
var e, y, d=document.getElementsByTagName("div");
	y = d[0].style.pixelTop + d[0].style.pixelHeight;
	for (i=1; i<d.length; i++) {
		e=d[i];
		if (e.style.visibility!="hidden") {
			if (e.style.pixelTop!=y)
				e.style.pixelTop=y;
			y=y+e.style.pixelHeight+1;
		}
	}
}

function alarrangeO()
{
	arrangeO();
	setTimeout("alarrangeO()", 5000);
}

function arrange() {
var e, y, d=document.layers;
	y=d[0].pageY+d[0].document.height;
	for (i=1; i<d.length; i++) {
		e=d[i];
		if(e.visibility != "hide") {
			e.pageY = y;
			y=y+e.document.height;
		}
	}
}

function closemn(mn) {
var o=null;
	if(isOP){
		o=document.getElementById("div"+mn);
		if(o==null) return;
		o.style.visibility="hidden";
		o=document.getElementById("img"+mn);
	}else if(isGood){
		o=document.getElementById("div"+mn);
		if(o==null) return;
		o.style.display='none';
		o=document.getElementById("img"+mn);
	}else if(isNS4){
		o = eval("document.layers['div"+mn+"']");
		if(o==null) return;
		o.visibility = "hide";
		o=eval("document.div"+mn+"a.document.images[0]");
	}
	if(o!=null) o.src='pic/plus.gif';
}

function openmn(mn) {
var o=null;
	if(isOP){
		o=document.getElementById("div"+mn);
		if(o==null) return;
		o.style.visibility="visible";
		o=document.getElementById("img"+mn);
	}else if(isGood){
		o=document.getElementById("div"+mn);
		if(o==null) return;
		o.style.display="block";
		o=document.getElementById("img"+mn);
	}else if(isNS4){
		o = eval("document.layers['div"+mn+"']");
		if(o==null) return;
		o.visibility = "show";
		o=eval("document.div"+mn+"a.document.images[0]");
	}
	if(o!=null) o.src='pic/nofollow.gif';
}

function changemn(mn) {
	if(wmn==mn){
		closemn(mn);
		wmn='-1';
	}else{
		if(wmn!='-1') closemn(wmn);
		openmn(mn);
		wmn=mn;
	}
	if(isNS4) arrange();
	if(isOP) arrangeO();
}

/* no use, disabled by atppp
function openchat()
{
	url='bbschat';
	chatWidth=screen.availWidth;
	chatHeight=screen.availHeight;
	winPara='toolbar=no,location=no,status=no,menubar=no,scrollbars=auto,resizable=yes,left=0,top=0,'+'width='+(chatWidth-10)+',height='+(chatHeight-27);
	window.open(url,'_blank',winPara);
}

function openreg()
{
	open('bbsreg', '', 'width=600,height=460,resizable=yes,scrollbars=yes');
}
*/

function submenu( isfav , favselect , group , group2 , yank )
{
	if( isfav == 1 )
	{
		linkurl = "bbsleft-submenu.php?select=" + favselect + "&fav";
		submenuname = "submenu_fav_" + favselect ;
		imgname = "submenuimg_fav_" + favselect ;
	}
	else
	{
		linkurl = "bbsleft-submenu.php?group=" + group + "&group2=" + group2 + "&yank=" + yank;
		submenuname = "submenu_brd_" + group + "_" + group2 ;
		imgname = "submenuimg_brd_" + group + "_" + group2 ;
	}
	submenustatus = document.getElementById(submenuname).style.display;
	if (submenustatus == "")
	{
		document.getElementById(imgname).src="pic/plus.gif";
		document.getElementById(submenuname).style.display="none";
	}
	if (submenustatus=="none")
	{
		document.getElementById(imgname).src="pic/nofollow.gif";
		document.getElementById(submenuname).style.display="";
		//if (document.getElementById(submenuname + "_td").innerHTML.substr(0,5)=="<DIV>")
		{
			document.getElementById(submenuname + "_td").innerHTML="<div>载入中……</div>";
			window.frames["hiddenframe"].document.location.href = linkurl ;
		}
	}
}

Is();

with (document) {
	write("<style type='text/css'>");
	if (isOP) {
		write(".s {position:absolute; visibility:hidden}");
		write(".r {position:absolute; visibility:visible}")
	} else if (isNS4) {
		write(".s {position:absolute; visibility:hide}");
		write(".r {position:absolute; visibility:show}")
	}else {
		write(".s {display:none}")
	}
	write("</style>");
}

if(isNS4) onload=arrange;
if(isOP) onload=arrangeO;