1，验证特殊符号字符串

function checkOtherChar(str){    //定义一个特殊符号的数组    var arr = ["*","&",">","<","$","\\""/",];    //循环比较数组中字符与字符串中每个字符    for(var i=0;i

2,取得某一范围的随机数

function getRandom(min,max){    //随机数    var random = Math.random()*(max - min) + min;    //向下取整    random = Math.floor(random);    return random;}