VB.NET进度条的方法代码

<DIV id="Lay1" style="Z-INDEX: 1; LEFT: 1%; VISIBILITY: hidden; WIDTH: 99%; CURSOR: crosshair; POSITION: absolute; TOP: 32px; HEIGHT: 95%; BACKGROUND-COLOR: #ffffff"><FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT><FONT face="宋体"></FONT><br>
<b><font color="#800080" size="2">      & nbsp;          正在检索数据，请稍候...</font></b>
<table align="center">
<tr>
<td>
<div style="BORDER-RIGHT: black 1px solid; PADDING-RIGHT: 2px; BORDER-TOP: black 1px solid; PADDING-LEFT: 2px; FONT-SIZE: 8pt; PADDING-BOTTOM: 2px; BORDER-LEFT: black 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: black 1px solid"><span id="progress1"> </span>
<span id="progress2"> </span> <span id="progress3"> </span> <span id="progress4">
 </span> <span id="progress5"> </span> <span id="progress6"> </span>
<span id="progress7"> </span> <span id="progress8"> </span> <span id="progress9">
 </span> <span id="progress10"> </span> <span id="progress11"> </span>
<span id="progress12"> </span> <span id="progress13"> </span><span id="progress14"> </span><span id="progress15"> </span>
</div>
</td>
</tr>
</table>
<script language="javascript">
var progressEnd = 15; // set to number of progress <span>s.
var progressColor = blue; // set to progress bar color
var progressInterval = 300; // set to time between updates (milli-seconds)
var progressAt = progressEnd;
var progressTimer;
function progress_clear() {
for (var i = 1; i <= progressEnd; i++) document.getElementById(progress+i).style.backgroundColor = transparent;
progressAt = 0;
}
function progress_update() {
progressAt++;
if (progressAt > progressEnd) progress_clear();
else document.getElementById(progress+progressAt).style.backgroundColor = progressColor;
progressTimer = setTimeout(progress_update(),progressInterval);
}
function progress_stop() {
clearTimeout(progressTimer);
progress_clear();
}
//progress_update(); // start progress bar
</script>
</DIV>

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
在此处放置初始化页的用户代码
If Not IsPostBack The
but_find.Attributes.Add("onClick", "Lay1.style.visibility=;progress_update();")
End If
End Sub

Public Sub scriptjdt(ByVal objPage As System.Web.UI.Page, ByVal strValue As String)
Dim jb As String
jb = "<script language=JavaScript>" + strValue + "</script>"
objPage.RegisterStartupScript("jdt_ok", jb)
End Sub

Private Sub but_find_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles but_find.Click
查询数据代码
----------------
Me.scriptjdt(Me, "Lay1.style.visibility=hidden;progress_stop();") 关闭进度条代码
End Sub