<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<script lanaguage="javascript">
function submit(){
if(check())
document.form1.submit();
}
</script><script language="javascript">
function check()
{
if(form1.text1.value=="")
{
alert("不能为空");
form1.text1.focus();
return false;
}
}
</script><body>
<form name="form1" method="post" action="index.jsp">
<p>
<input type="text" name="text1">
</p>
</form><p><a href="javascript:submit()">提交</a></p>
</body>
</html>
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<script lanaguage="javascript">
function submit(){
if(check())
document.form1.submit();
}
</script><script language="javascript">
function check()
{
if(form1.text1.value=="")
{
alert("不能为空");
form1.text1.focus();
return false;
}
}
</script><body>
<form name="form1" method="post" action="index.jsp">
<p>
<input type="text" name="text1">
</p>
</form><p><a href="javascript:submit()">提交</a></p>
</body>
</html>
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