

<html>
<body>

<form method="post" action="demo_aspnet_textbox_4.aspx" id="ctl00">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKLTczMTE0NTI3OWRkE3F2iT3RyNMMY/EKn56wma3kGFNWhuR6uAhFqRd/xQs=" />

<input type="hidden" name="__VIEWSTATEGENERATOR" id="__VIEWSTATEGENERATOR" value="4615492D" />
<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEdAAN58IT0I5D5k75V5CmoqAEoscfOVKgi+tKUa7rIRxwonfFOuDuz94bvRQgA6h3c7GoeuUzTLiEktkkGteZG+BacxEh/T2vrPSqHoswtDtxBVA==" />
<textarea name="txt1" rows="2" cols="20" id="txt1" Font_Face="verdana">
Hello World!</textarea>
<input type="submit" name="ctl01" value="把文本复制到 Label" />
<p><span id="lbl1"></span></p>
</form>

</body>
</html>