<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title></title>
<link rel="icon" href="favicon.ico" type="image/x-icon" />
<#include "/WEB-INF/template/common/include.ftl">
<link href="${base}/template/shop/css/product_comment.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="${base}/template/shop/js/validate.js"></script>
<script type="text/javascript">
$().ready( function() {
$("#submitcomment").click(function(){
$("#commentForm").submit();
})
})
</script>
</head>
<body>
<div class="product_content_right">
<form id="commentForm" action="${base}/shop/comment!save.action" method="post" enctype="multipart/form-data" >
<input type="hidden" name="productid" value="${(id)!}">
<div class="product_content_right-2">
</div>
<div class="product_content_right-3">
<span>*</span> 标题
<input type="text" id="username" name="comment.title" class="product_content_text"> 必填,长度在4-20个字之间
</div>
<input type="button" value="提 交" id="submitcomment">
</form>
</div>
</body>
</html>
给input里写个非空和长度的验证,小弟初学,不怎么会写
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title></title>
<link rel="icon" href="favicon.ico" type="image/x-icon" />
<#include "/WEB-INF/template/common/include.ftl">
<link href="${base}/template/shop/css/product_comment.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="${base}/template/shop/js/validate.js"></script>
<script type="text/javascript">
$().ready( function() {
$("#submitcomment").click(function(){
$("#commentForm").submit();
})
})
</script>
</head>
<body>
<div class="product_content_right">
<form id="commentForm" action="${base}/shop/comment!save.action" method="post" enctype="multipart/form-data" >
<input type="hidden" name="productid" value="${(id)!}">
<div class="product_content_right-2">
</div>
<div class="product_content_right-3">
<span>*</span> 标题
<input type="text" id="username" name="comment.title" class="product_content_text"> 必填,长度在4-20个字之间
</div>
<input type="button" value="提 交" id="submitcomment">
</form>
</div>
</body>
</html>
给input里写个非空和长度的验证,小弟初学,不怎么会写
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title></title>
<link rel="icon" href="favicon.ico" type="image/x-icon" />
<#include "/WEB-INF/template/common/include.ftl">
<link href="${base}/template/shop/css/product_comment.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="${base}/template/shop/js/validate.js"></script>
<script type="text/javascript" src="jquery-1.2.3.pack.js"></script>
<script type="text/javascript">
$().ready( function() {
$("#submitcomment").click(function(){
var username = document.getElementById("username");
if(username.value == "" || username.value == undefined)
{
alert("请输入用户名");
return false;
}
$("#commentForm").submit();
})
})
</script>
</head>
<body>
<div class="product_content_right">
<form id="commentForm" action="${base}/shop/comment!save.action" method="post" enctype="multipart/form-data" >
<input type="hidden" name="productid" value="${(id)!}">
<div class="product_content_right-2">
</div>
<div class="product_content_right-3">
<span>*</span> 标题
<input type="text" id="username" name="comment.title" class="product_content_text"> 必填,长度在4-20个字之间
</div>
<input type="button" value="提 交" id="submitcomment">
</form>
</div>
</body>
</html>
$("#submitcomment").click(function(){
var len = $("#username").val().length;
if(!len){
alert("用户名不能为空");
}else if(len < 4 || len > 20){
alert("用户名长度要大于4小于20");
}else{
$("#commentForm").submit();
}
return false;
})
})
if(obj.value == ""){
alert('用户名不能为空');
return;
}else if(obj.value.length<4){
alert('用户名长度不能少于4');
return;
}
}<input type="text" id="username" name="comment.title" class="product_content_text" onblur="checkVal(this)" maxlength="20"> 必填,长度在4-20个字之间