/*
* 首页伸缩菜单
* Cole modify:03/31/2009
*/
function onloadNav()
{
rolinTab("rolin");
}
//事件侦听
if(window.attachEvent)
{
window.attachEvent("onload", onloadNav);
}
if(window.addEventListener)
{
window.addEventListener("load", onloadNav, false);
}
function rolinTab(obj)
{
var list = $(obj).getElementsByTagName("li");
var state = {show:false, hidden:false, showObj:false};
for (var i = 0; i < list.length; i++)
{
var tmp = new rolinItem(list[i], state);
if (i == 0) tmp.pShow();
}
}
function rolinItem(obj, state)
{
var speed = 0.0666;
var range = 1;
var interval;
var tarH;
var tar = this;
var head = getFirstChild(obj);
var content = getNextChild(head);
var isOpen = false;
this.pHidden = function()
{
if (isOpen) hidden();
}
this.pShow = show;
var baseH = content.offsetHeight;
content.style.display = "none";
var isOpen = false;
head.onmouseover = function()
{
this.style.cssText = "width:150x; height:24px; background:#CDD6DD url(images/ico_arrow03.gif) no-repeat 8px 8px; font-size:12px; line-height:24px; padding-left:20px; color:#235F83; cursor:pointer;";
}
head.onmouseout = mouseout;
head.onclick = function()
{
this.style.cssText = "width:150x; height:24px; background:#CDD6DD url(images/ico_arrow03.gif) no-repeat 8px 8px; font-size:12px; line-height:24px; padding-left:20px; color:#235F83; cursor:pointer;";
if (!state.show && !state.hidden)
{
if (!isOpen)
{
head.onmouseout = null;
show();
}
else
{
hidden();
}
}
}
function mouseout()
{
this.style.cssText = "width:150x; height:24px; background:#CDD6DD url(images/ico_arrow03.gif) no-repeat 8px 8px; font-size:12px; line-height:24px; padding-left:20px; color:#235F83; cursor:pointer;";
}
function show()
{
head.style.borderBottom = "1px solid #CDD6DD";
state.show = true;
if (state.openObj && state.openObj != tar )
{
state.openObj.pHidden();
}
content.style.height = "0px";
content.style.display = "block";
content.style.overflow = "hidden";
state.openObj = tar;
tarH = baseH;
interval = setInterval(move, 10);
}
function showS()
{
isOpen = true;
state.show = false;
}
function hidden()
{
state.hidden = true;
tarH = 0;
interval = setInterval(move, 10);
}
function hiddenS()
{
head.style.borderBottom = "none";
head.onmouseout = mouseout;
head.onmouseout();
content.style.display = "none";
isOpen = false;
state.hidden = false;
}
function move()
{
var dist = (tarH - content.style.height.pxToNum()) * speed;
if (Math.abs(dist) < 1) dist = dist > 0 ? 1 : -1;
content.style.height = (content.style.height.pxToNum() + dist) + "px";
if (Math.abs(content.style.height.pxToNum() - tarH) <= range )
{
clearInterval(interval);
content.style.height = tarH + "px";
if (tarH != 0)
{
showS()
}
else
{
hiddenS();
}
}
}
}
var $ = function($)
{
return document.getElementById($)
};
String.prototype.pxToNum = function()
{
return Number(this.replace("px", ""))
}
function getFirstChild(obj)
{
var result = obj.firstChild;
while (!result.tagName)
{
result = result.nextSibling;
}
return result;
}
function getNextChild(obj)
{
var result = obj.nextSibling;
while (!result.tagName)
{
result = result.nextSibling;
}
return result;
}