<html>
<head>
<title>录入商品信息</title>
<style type="text/css">
*{font-size: 12px;}
</style>
<script type="text/javascript">
function save(form){
if(form.name.value==""){
alert("请输入名称");
return false;
}
if(form.price.value==""){
alert("请输入价格");
return false;
}
if(form.description.value==""){
alert("请输入商品描述");
return false;
}
if(isNaN(form.price.value)){
alert("价格请输入数字");
return false;
}
}
</script>
</head>
<body>
<form action="service.jsp" method="post" onsubmit="return save(this)">
<table border="1" align="center" width="300">
<tr>
<td align="center" colspan="2">
<br><h1>录入商品信息</h1>
</td>
</tr>
<tr>
<td align="right">商品名称：</td>
<td><input type="text" name="name"></td>
</tr>
<tr>
<td align="right">价 格：</td>
<td><input type="text" name="price"></td>
</tr>
<tr>
<td align="right">商品描述：</td>
<td><textarea name="description" cols="30" rows="3"></textarea></td>
</tr>
<tr>
<td align="center" colspan="2">
<input type="submit" value="提 交">
<input type="reset" value="重 置">
</td>
</tr>
</table>
</form>
</body>
</html>
原文：http://www.cnblogs.com/ganjun/p/5044335.html