DIV弹出窗口控件

在项目开发中，很多地方都使用了window.open 和window.showdialog两种弹出窗口模式。刚开始看公司老的一些项目里都是用这些的，自己也就跟着用，后来感觉每个页面都写JS，太麻烦了，即使是COPY一下，也觉得不爽，而且老是用这两种，感觉没什么意思，难看，能不能用个好看点的，呵呵。看来我对美好的事物还是有追求的。
 在网络上找到了一个不错的DIV弹出窗口，还算漂亮吧
网址是http://www.subimage.com/dhtml/subModal
对象是找好了，接下就是给它弄点嫁妆，尤其是衣裳，好好的修饰打扮下才能出来见人啊
大多数的弹出窗口都是要有返回值的，所以决定控件的模样是一个textbox 加两个图片按钮如图
一个是选择，另外一个清空按钮
开始先写这个复合控件

using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.ComponentModel;
namespace StarTech.WebControls
{
    [ParseChildren(true)]
    [DefaultValue("Text"), ToolboxData("<{0}:STSingleCarSelect runat='server' Width='150px' ></{0}:STSingleCarSelect>")]
    public class STSingleCarSelect : BaseFormControl
    {
        private TextBox _textbox;
        private HiddenField _hiddenField;
        private HtmlImage _image;
        private HtmlImage _delimage = new HtmlImage();
        private bool _requiredfield = false;
        private int _intTextBoxWidth = 100;
        private int _intDiglogHeight = 500;
        private int _intDiglogWidth = 700;
        private string _strDiglogTitle = "车辆列表";
        private string _sourceUrl = "~/ControlSource/Dialog/SingleCarListSelect.aspx";
        属性#region 属性
        [Description("文本框Text"), Category("ST属性")]
        public string Text
        {
            get
            {
                EnsureChildControls();
                return _textbox.Text;
            }
            set
            {
                EnsureChildControls();
                _textbox.Text = value;
            }
        }
        [Description("文本框ID"), Category("ST属性")]
        public string Value
        {
            get
            {
                EnsureChildControls();
                return _hiddenField.Value;
            }
            set
            {
                EnsureChildControls();
                _hiddenField.Value = value;
            }
        }
        [Description("是否必填"), Category("ST属性")]
        public bool RequiredField
        {
            get { return _requiredfield; }
            set { _requiredfield = value; }
        }
        private string RegName
        {
            get
            {
                return "RegSingleCarScript";
            }
        }
        [Description("文本框宽度"), Category("ST属性")]
        public int TextBoxWidth
        {
            get { return _intTextBoxWidth; }
            set { _intTextBoxWidth = value; }
        }
        [Description("弹出窗体高度"), Category("ST属性")]
        public int DiglogHeight
        {
            get { return _intDiglogHeight; }
            set { _intDiglogHeight = value; }
        }
        [Description("弹出窗体宽度"), Category("ST属性")]
        public int DiglogWidth
        {
            get { return _intDiglogWidth; }
            set { _intDiglogWidth = value; }
        }
        public string DiglogTitle
        {
            get { return _strDiglogTitle; }
            set { _strDiglogTitle = value; }
        }
        #endregion
        protected override void OnPreRender(EventArgs e)
        {
            this.Page.ClientScript.RegisterClientScriptResource(typeof(JsCommon), "StarTech.WebControls.ControlSource.JScript.common.js");
            this.Page.ClientScript.RegisterClientScriptResource(typeof(JsSubModal), "StarTech.WebControls.ControlSource.JScript.subModal.js");
            string resource = Page.ClientScript.GetWebResourceUrl(this.GetType(), "StarTech.WebControls.ControlSource.Css.subModal.css");
            string csslink = "<link href='" + resource + "' rel='stylesheet' type='text/css' />";
            Page.Header.Controls.Add(new LiteralControl(csslink));
            if (!this.Page.ClientScript.IsStartupScriptRegistered(this.RegName))
            {
                this.Page.ClientScript.RegisterStartupScript(this.GetType(), this.RegName, this.RegSouceScript(), false);
            }
            base.OnPreRender(e);
        }
        protected override void AddAttributesToRender(HtmlTextWriter writer)
        {
            EnsureChildControls();
            _image.Attributes.Add("onclick", "OpenPopWinSingleCar()");
            _delimage.Attributes.Add("onclick", "ClearSingleCar()");
            base.AddAttributesToRender(writer);
        }
        protected override void CreateChildControls()
        {
            Controls.Clear();
            _textbox = new TextBox();
            _textbox.ID = _textbox.UniqueID;
            _textbox.CssClass = CssClass;
            _textbox.TextMode = TextBoxMode.SingleLine;
            _textbox.Attributes["Style"] = "border:1 solid gray;";
            _textbox.Width = Unit.Pixel(_intTextBoxWidth);
            _textbox.Height = this.Height;
            Controls.Add(_textbox);
            //空格
            Controls.Add(new LiteralControl("&nbsp;"));
            //选择图片
            _image = new HtmlImage();
            _image.ID = _image.UniqueID;
            _image.Alt = "选 择";
            _image.Src = Page.ClientScript.GetWebResourceUrl(this.GetType(), "StarTech.WebControls.ControlSource.Images.application_add.png");
            _image.Style.Value = "CURSOR:hand;";
            Controls.Add(_image);
            //空格
            Controls.Add(new LiteralControl("&nbsp;"));
            //删除
            _delimage.ID = _delimage.UniqueID;
            _delimage.Src = Page.ClientScript.GetWebResourceUrl(this.GetType(), "StarTech.WebControls.ControlSource.Images.application_delete.png");
            _delimage.Style.Value = "CURSOR:hand;";
            _delimage.Alt = "删 除";
            Controls.Add(_delimage);
            //隐藏控件
            _hiddenField = new HiddenField();
            Controls.Add(_hiddenField);
            if (_requiredfield)
            {
                this.Controls.Add(new LiteralControl("<font color=red>*</font>"));
                RequiredFieldValidator validator = new RequiredFieldValidator();
                validator.ControlToValidate = _textbox.ID;
                validator.Text = "必填";
                validator.Font.Size = 9;
                validator.Display = ValidatorDisplay.Dynamic;
                if (this.ErrorMessage != null && this.ErrorMessage != "")
                {
                    validator.ErrorMessage = this.ErrorMessage;
                }
                else
                {
                    validator.ErrorMessage = "必填";
                }
                this.Controls.Add(validator);
            }
            base.CreateChildControls();
        }
        /**//// <summary>
        /// 实现脚本
        /// </summary>
        /// <returns></returns>
        private string RegSouceScript()
        {
            JavaScriptWriter js = new JavaScriptWriter(true);

            js.AddLine("  rnd.today=new Date(); ");
            js.AddLine("  rnd.seed=rnd.today.getTime(); ");
            js.AddLine("  function rnd() { ");
            js.AddLine("  rnd.seed = (rnd.seed*9301+49297) % 233280; ");
            js.AddLine("  return rnd.seed/(233280.0); ");
            js.AddLine("  }; ");
            js.AddLine("  function rand(number) { ");
            js.AddLine("  return Math.ceil(rnd()*number); ");
            js.AddLine("  }; ");
            js.AddLine("  function AlertMessageBoxSingleCar(returnValue)");
            js.AddLine("  {");
            js.AddLine("  var indexvalue;");
            js.AddLine("  if (returnValue!=undefined){ ");
            js.AddLine("    var txtname=document.getElementById('" + _textbox.ClientID + "');");
            js.AddLine("    var txtid=document.getElementById('" + _hiddenField.ClientID + "');");
            js.AddLine("    indexvalue=returnValue.indexOf('|');");
            js.AddLine("    txtname.value = returnValue.substring(0,indexvalue);");
            js.AddLine("    txtid.value = returnValue.substring(indexvalue+1);");
            js.AddLine("   }");
            js.AddLine("   }");
            js.AddLine("   function OpenPopWinSingleCar()");
            js.AddLine("   {");
            js.AddLine("    showPopWin('" + _strDiglogTitle + "','" + ResolveUrl(_sourceUrl) + "?'+rand(10000000), " + _intDiglogWidth + ", " + _intDiglogHeight + ", AlertMessageBoxSingleCar,true,true);");
            js.AddLine("   }");

            js.AddLine(" function ClearSingleCar()");
            js.AddLine(" { ");
            js.AddLine("    document.all." + _textbox.ClientID + ".value=\"\";");
            js.AddLine("    document.all." + _hiddenField.ClientID + ".value=\"\";");
            js.AddLine(" }");

            return js.ToString();
        }
    }
}

控件是已经写好了，但是源页面，还是要通过外面程序提供，我的控件里面都已经写死了，其实也可以给他写个属性
让它可以在外部定义。
接下来就是如果获得源页面的返回值，具体代码如下

 //返回值
window.returnVal="nosnowwolf";
//关闭窗口
 window.parent.hidePopWin(true); 

OK,这样就可以了，可能我表达的不是很清楚，希望大家能给点意见，改天把代码放出来