<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>检查表单</title>
</head>
<body>
<span>请输入一个六位数</span>
<input id="number" name="number" type="text">
<button type="button" id="btn" onclick="check()">检查</button>
<script type="text/javascript">
function check(){
var num = document.getElementById(number);
var value = num.value;
if(num.length != 6){
alert("请输入一个6位数");
return false;
}
if(isNON(parseInt(value))){
alert("请输入数字");
return false;
}
alert("校验成功");
return true;
}
</script>
</body>
</html>
<html>
<head>
<meta charset="UTF-8">
<title>检查表单</title>
</head>
<body>
<span>请输入一个六位数</span>
<input id="number" name="number" type="text">
<button type="button" id="btn" onclick="check()">检查</button>
<script type="text/javascript">
function check(){
var num = document.getElementById(number);
var value = num.value;
if(num.length != 6){
alert("请输入一个6位数");
return false;
}
if(isNON(parseInt(value))){
alert("请输入数字");
return false;
}
alert("校验成功");
return true;
}
</script>
</body>
</html>