js验证手机号码格式

function checkPhone(){ 
    var phone = document.getElementById('phone').value;
    if(!(/^1(3|4|5|6|7|8|9)\d{9}$/.test(phone))){ 
        alert("手机号码有误，请重填");  
        return false; 
    } 
}

function checkPhone(){ 
    var phone = document.getElementById('phone').value;
    if(!(/^1[3456789]\d{9}$/.test(phone))){ 
        alert("手机号码有误，请重填");  
        return false; 
    } 
}