<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>正则</title>
<style type="text/css">
</style>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
//校验QQ
/*
//JS的方式比较麻烦
function checkQQ(qq){
var flag = true;//默认符合要求
if(qq.length>=5 && qq.length<=15){
if(qq.indexOf("0")){
if(isNaN(qq)){
flag = false;//不是数字
}
}else{
flag = false;//以0开头，不符合QQ标准
}
}else{
flag = false;//长度不符合
}
return flag;
}
console.log(checkQQ("012345"));
console.log(checkQQ("a12b345"));
console.log(checkQQ("123456"));//true
console.log(checkQQ("1234567890987654321"));
*/
//正则匹配简单高效
var regex = /^[1-9]\d{4,14}$/;
console.log(regex.test("012345"));
console.log(regex.test("a12b345"));
console.log(regex.test("123456"));//true
console.log(regex.test("1234567890987654321"));
</script>
</head>
<body>
</body>
</html>
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