这个函数是处理节点关闭的,但是却没有反应,
function parseSubTree(id)
{
var el= document.getElementById( id );
var ulElmt= document.createElement("UL");
ulElmt.innerHTML=_xmlHttpRequestObj.responseText;
el.appendChild(ulElmt);
var images = el.getElementsByTagName("IMG");
images[0].setAttribute("src", "images/minus.gif");
images[0].setAttribute("onclick", "showHide('"+id+"')");
var aTag = el.getElementsByTagName("A");
aTag[0].setAttribute("onclick", "showHide('"+id+"')");
var loadDiv= document.getElementById( "load" );
loadDiv.style.display="none";
}