ip地址，字符串、数字格式转换(js版)

js代码如下

function ipToNumber(ip) {var numbers = ip.split(".");return parseInt(numbers[0])*256*256*256 + parseInt(numbers[1])*256*256 + parseInt(numbers[2])*256 + parseInt(numbers[3]);}function numberToIp(number) {return (Math.floor(number/(256*256*256))) + "." + (Math.floor(number%(256*256*256)/(256*256))) + "." + (Math.floor(number%(256*256)/256)) + "." + (Math.floor(number%256));}