// JavaScript Document
//定义popupMenu类
function dhlayer(){
//author:dh20156
this.content = null;
this.background = "buttonface";
this.border = "none";
this.fontSize = "12px";
this.padding = "2px;"
this.cursor = "default";
//popupMenu childNodes
this.childNodes = new Array();
//popupMenu body
this.body = null;

//定义popupMenu方式
var layer = document.createElement("DIV");

//popupMenu的显示方法，参数w-width(popupMenu宽),h-height(popupMenu高),o-parent Object(popupMenu的父对象)
this.show = function(l,t,w,h,o){

    l = l+"px";
    t = t+"px";
    w = w+"px";
    h = h+"px";

    //应用IFRAME以遮蔽顶层对象
    var ifr = document.createElement("IFRAME");
    ifr.style.width = "100%";
    ifr.style.height = "100%";
    ifr.style.border = "none";
    ifr.style.zIndex = "-1";
    ifr.style.position = "absolute";
    ifr.style.top = "0px";
    ifr.style.left = "0px";

    //应用DIV以遮蔽IFRAME的右键
    var il = document.createElement("DIV");
    il.id = "dhlayercontent";
    il.style.width = w;
    il.style.height = h;
    il.style.overflowX = "hidden";
    il.style.overflowY = "auto";
    il.style.border = this.border;
    il.style.background = this.background;
    il.style.zIndex = "100";
    il.style.position = "absolute";
    il.style.top = "0px";
    il.style.left = "0px";
    il.style.padding = this.padding;
    il.style.fontSize = this.fontSize;
    il.innerHTML = this.content;
    il.style.cursor = this.cursor;

    layer.id = "dhlayer";
    layer.style.padding = "0px";
    layer.style.background = this.background;
    layer.style.border = "none";
    layer.style.zIndex = "1";
    layer.style.width = w;
    layer.style.height = h;
    layer.style.position = "absolute";
    layer.style.left = l;
    layer.style.top = t;
    layer.appendChild(ifr);
    layer.appendChild(il);
    if(document.getElementById("dhlayer")!=null){
     o.replaceChild(layer,document.getElementById("dhlayer"));
    }else{
     o.appendChild(layer);
    }
    this.childNodes = il.childNodes;
    this.body = il;
}

//popupMenu hide
this.hide = function(){
    layer.style.display = "none";
}
if(document.all){
    document.attachEvent("onclick",this.hide);
}else{
    document.addEventListener("click",this.hide,true);
}

}