// =================== 处理文件夹的相关函数 ================
// ========== 同时支持IE 及 FireFox ========================
// ========== vallis 2005/01 wstock.net ===============================

var mRB=false;		// 鼠标目前是否在右键菜单上
var IE5=(document.getElementById && document.all) ? true : false;
var W3C=(document.getElementById)? true: false;   // IE5 及Firefox均可使得W3C变量为true

with (document) {
	write("<STYLE TYPE='text/css'>");
	write(".c {position:relative; display:none}");
	write(".mRB {position: absolute ; left:300;top:100; display:none}");
	write("</STYLE>");
}

// vEL：结点ID；
function expandIt(vEL) {
	var whichEl;

	whichEl=document.getElementById(vEL);
       	if (whichEl.style.display == "none" || whichEl.style.display == "") {
            whichEl.style.display = "block";
	    whichEl=document.getElementById("f" + vEL);
	    whichEl.src=mMinusPic;
       	} else { whichEl.style.display = "none";
	    whichEl=document.getElementById("f" + vEL);
	    whichEl.src=mPlusPic;
	}
}