function showHide(id)
{
var el= document.getElementById(id);//?? <li>???id
var bExpand = true;//???Action???
var images = el.getElementsByTagName("img");//?? <li> </li>????? <IMG>??
if (images[0].src.indexOf("minus.gif")!=-1)//?????????
{
bExpand = false;//??Action???
images[0].src="images/images/plus.gif";//???????
}else{
images[0].src="images/images/minus.gif";//?????????
}
var subs=el.lastChild;//?? <ul> </ul>??
if(bExpand)//?????
subs.style.display="block";//?? <ul> </ul>?????
else//?????
subs.style.display="none";//?? <ul> </ul>?????
}
function getSubTree(id)
{
var submitURL="treeview?parent="+id;
postXmlHttp( submitURL, 'parseSubTree("'+id+'")' ,'load("'+id+'")');
}
function parseSubTree(id)
{
var el= document.getElementById( id );//???id? <li>??
var ulElmt= document.createElement("UL");//???? <ul>??
ulElmt.innerHTML=_xmlHttpRequestObj.responseText;//??????? <ul>
el.appendChild(ulEl
