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| <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>js验证表单示例</title>
<script>
function validateForm(){
var x=document.forms["myForm"]["fname"].value;
if(x==null||x==""){
alert('姓不能为空');
return false;
}
}
</script>
</head>
<body>
<form name="myForm" action="/statics/demosource/demo-form.php" onsubmit="return validateForm()" method="post">
姓: <input type="text" name="fname">
<input type="submit" value="提交">
</form>
</body>
</html>
|