<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function formCheck(){//表单验证
var userForm=document.forms.userForm
if(userForm.username.value==null||userForm.username.value.length<=0){
alert("用户名不能为空")
return false
}else if(userForm.username.value.length<6||userForm.username.value.length>20){
alert("用户名必须为6-20位")
return false
}else if(userForm.password.value==null||userForm.password.value.length<=0){
alert("密码不能为空")
return false
}else if(userForm.password.value.length<6||userForm.password.value.length>20){
alert("密码必须为6-20位")
return false
}else{
userForm.submit()
}
}
</script>
</head>
<body>
<form action="" name="userForm">
userName:<input type="text" name="username"><br>
password:<input type="password" name="password"><br>
<input type="button" value="提交" onclick=" formCheck()">
</form>
</body>
</html>
验证函数如下:function chkfrm(o){
if(!/\d+/gi.test(o.empid.value)){
alert('雇员编号：只能是数字。')
return false
}
if(o.empname.value==''){
alert('雇员姓名：不能为空。')
return false
}
if(o.empjob.value==''){
alert('雇员工作：不能为空。')
return false
}
if(!/^((((1[6-9]|[2-9]\d)\d{2})[-\/](0?[13578]|1[02])[-\/](0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})[-\/](0?[13456789]|1[012])[-\/](0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})[-\/]0?2[-\/](0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))[-\/]0?2[-\/]29[-\/]))$/gi.test(o.emptime.value)){
alert('雇佣日期：必须是日期格式，即2013-03-02')
return false
}
if(isNaN(o.empmoney.value)){
alert('基本工资：必须是数字（小数）')
return false
}
if(isNaN(o.emprw.value)){
alert('奖金：必须是数字（小数）')
return false
}
}
将
<form action="" method="post">
改为
<form action="" method="post" onsubmit="javascript:return chkfrm(this)">
即可
