常用正则表达式（匹配URL/email/number）

var URL_REGEXP = /^(ftp|http|https)://(w+:{0,1}w*@)?(S+)(:[0-9]+)?(/|/([w#!:.?+=&%@!-/]))?$/;
var EMAIL_REGEXP = /^[a-z0-9!#$%&'*+/=?^_`{|}~.-]+@[a-z0-9-]+(.[a-z0-9-]+)*$/i;
var NUMBER_REGEXP = /^s*(-|+)?(d+|(d*(.d*)))s*$/;