JSP调用JavaScript进行表单验证
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2022-03-01 14:51:50
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JSP调用JavaScript进行表单验证
<html>
<head>
<script language="JavaScript">
function validate(form1)
{
for (i = 0; i < form1.length; i++){
if( (form1.elements[i].value == "")){
alert("You must provide a value for the field named: " +
form1.elements[i].name)
return false
}
}
return true
}
</script>
<title>Help Page</title></head><body>
<h2>Please submit your information</h2>
<form action ="jspUsejs.jsp" onSubmit=" return validate(this)">
<table border="0"><tr><td valign="top">
Your name: </td> <td valign="top">
<input type="text" name="username" size="20">
</td></tr><tr><td valign="top">
Your email: </td> <td valign="top">
<input type="text" name="email" size="20">
</td></tr>
<tr><td valign="top">
<input type="submit" value="Submit Info"></td></tr>
</table></form>
</body></html>