一些常用的JS小函数

验证码60秒倒计时

var wait=60;
function time(o) {
    if (wait == 0) {
        o.removeAttribute("disabled");   
        o.value="验证码";
        wait = 60;    
    } else { 
        o.setAttribute("disabled", true);
        o.value="(" + wait + ")秒";
        wait--;
        setTimeout(function() {
            time(o)
        },
        1000)
    }
 }

获取url上的附加参数数组

function GetParams() {
    var queryString = window.location.search; //获取url中"?"符后的字串
    var params = {};
    if (queryString.indexOf("?") != -1) {
        queryString = queryString.substr(1);
        paramArray = queryString.split("&");
        for (var i = 0; i < paramArray.length; i++) {
          
        }
    }
return params;
}

分数变百分数

function percentNum(num1,num2) { 
    var a = num1;
    var b = num2;
    return (Math.round(a / b * 10000) / 100.00 + "%"); //小数点后两位百分比
}