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有一个Form框, 我想在点击"Send"之后清除里面的信息, 就是一般聊天室里的那样, 请问该如何实现.
<html>
<script language="javascript">
function checkmessage()
{
if (msgform.message.value=="")
{
alert("Speech can not be empty!");
msgform.message.focus();
return false;
}
//
msgform.message.focus();
return true;
}
</script>
<body>
<form action="message.php" target="r_top" method="post" name="msgform" onsubmit="return checkmessage()" >
<p>Send:<input type="text" name="message" maxlength=120 size=50>
<input name="submit" type="submit" value="Send">
Color:<select name="color" >
<option value=#FF0000>Red</option>
<option value=#FFFF00>Yellow</option>
<option value=#0000FF>Blue</option>
</select>
</p>
</form>
</body>
</html>
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