Example of simulated pop-up window function implemented by jQuery

//初始化文档
$(document).ready();
//----------------弹出DIV仿模态窗口开始----------------
var divW;  //DIV宽度
var divH;  //DIV高度
var clientH;  //浏览器高度
var clientW;  //浏览器宽度
var divTitle;  //DIV标题
var pageUrl;  //DIV中加载的页面
var div_X;  //DIV横坐标
var div_Y;  //DIV纵坐标
function DivWindowOpen(divWidth,divHeight,title,url){
  divW = divWidth;  //DIV宽度
  divH = divHeight;  //DIV高度
  divTitle = title;  //DIV高度
  pageUrl = url;  //DIV中加载的页面UR
  lockScreen();  //锁定背景
  divOpen();
  $("#divTitle").append(divTitle);
  $("#divContent").load(pageUrl);
  //交换X图片
  $("#x").hover(
    function(){
      $(this).attr("src","images/Close-2.gif");
    },
    function(){
      $(this).attr("src","images/Close-1.gif");
    }
  );
  //关闭DIV窗口
  $("#x").click(
    function(){
      clearDivWindow();
      clearLockScreen();
    }
  );
}
//返回弹出的DIV的坐标
function divOpen(){
  var minTop = 80;  //弹出的DIV记顶部的最小距离
  if($("#divWindow").length == 0){
    clientH = $(window).height();  //浏览器高度
    clientW = $(window).width();  //浏览器宽度
    div_X = (clientW - divW)/2;  //DIV横坐标
    div_Y = (clientH - divH)/2;  //DIV纵坐标
    div_X += window.document.documentElement.scrollLeft;  //DIV显示的实际横坐标
    div_Y += window.document.documentElement.scrollTop;  //DIV显示的实际纵坐标
    if(div_Y < minTop){
      div_Y = minTop;
    }
    $("body").append("<div id=&#39;divWindow&#39;><div id=&#39;divTitle&#39;><img src=&#39;images/Close-1.gif&#39; id=&#39;x&#39; /></div><div id=&#39;divContent&#39;>载入中</div></div>");  //增加DIV
    //divWindow的样式
    $("#divWindow").css("position","absolute");
    $("#divWindow").css("z-index","200");
    $("#divWindow").css("left",(div_X + "px"));  //定位DIV的横坐标
    $("#divWindow").css("top",(div_Y + "px"));  //定位DIV的纵坐标
    $("#divWindow").css("opacity","0.9");
    $("#divWindow").width(divW);
    $("#divWindow").height(divH);
    $("#divWindow").css("background-color","#FFFFFF");
    $("#divWindow").css("border","solid 1px #333333");
    //divTitle的样式
    $("#divTitle").css("height","20px");
    $("#divTitle").css("line-height","20px");
    $("#divTitle").css("background-color","#333333");
    $("#divTitle").css("padding","3px 5px 1px 5px");
    $("#divTitle").css("color","#FFFFFF");
    $("#divTitle").css("font-weight","bold");
    //x的样式
    $("#x").css("float","right");
    $("#x").css("cursor","pointer");
    //divContent的样式
    $("#divContent").css("padding","10px");
  }
  else{
    clientH = $(window).height();  //浏览器高度
    clientW = $(window).width();  //浏览器宽度
    div_X = (clientW - divW)/2;  //DIV横坐标
    div_Y = (clientH - divH)/2;  //DIV纵坐标
    div_X += window.document.documentElement.scrollLeft;  //DIV显示的实际横坐标
    div_Y += window.document.documentElement.scrollTop;  //DIV显示的实际纵坐标
    if(div_Y < minTop){
      div_Y = minTop;
    }
    $("#divWindow").css("left",(div_X + "px"));  //定位DIV的横坐标
    $("#divWindow").css("top",(div_Y + "px"));  //定位DIV的纵坐标
  }
}
//锁定背景屏幕
function lockScreen(){
  if($("#divLock").length == 0){  //判断DIV是否存在
    clientH = $(window).height();  //浏览器高度
    clientW = $(window).width();  //浏览器宽度
    //var docH = $("body").height();  //网页高度
    //var docW = $("body").width();  //网页宽度
    //var bgW = clientW > docW ? clientW : docW;  //取有效宽
    //var bgH = clientH > docH ? clientH : docH;  //取有效高
    $("body").append("<div id=&#39;divLock&#39;></div>")  //增加DIV
    $("#divLock").height(clientH);
    $("#divLock").width(clientW);
    $("#divLock").css("display","block");
    $("#divLock").css("background-color","#000000");
    $("#divLock").css("position","fixed");
    $("#divLock").css("z-index","100");
    $("#divLock").css("top","0px");
    $("#divLock").css("left","0px");
    $("#divLock").css("opacity","0.5");
  }
  else{
    clientH = $(window).height();  //浏览器高度
    clientW = $(window).width();  //浏览器宽度
    $("#divLock").height(clientH);
    $("#divLock").width(clientW);
  }
}
//清除背景锁定
function clearLockScreen(){
  $("#divLock").remove();
}
//清除DIV窗口
function clearDivWindow(){
  $("#divWindow").remove();
}
//窗口大小改变时
$(window).resize(
    function(){
      if($("#divLock").length != 0){
        lockScreen();
      }
      if($("#divWindow").length != 0){
        divOpen();
      }
    }
);
//----------------弹出DIV仿模态窗口结束----------------
//改变风格
function ChangeStyle(styleName){
  skinName = styleName;
  //SetCookie("Skin", skinName);
  alert(styleName);
  window.location.reload();
}