1,金钱格式化
1234567890 --> 1,234,567,890
var test1 = '1234567890'
var format = test1.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
console.log(format) // 1,234,567,890
2,手机验证
/^1[35789]\d{9}$/.test(str)
3.email
/^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(str)
5.中文验证
/^[\u4e00-\u9fa5]+$/