JS常用方法

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function GetPercent(num, total) {     /// <summary>     /// 求百分比     /// </summary>     /// <param name="num">当前数</param>     /// <param name="total">总数</param>     num = parseFloat(num);     total = parseFloat(total);     if (isNaN(num) || isNaN(total)) {         return "-";     }     return total <= 0 ? "0%" : (Math.round(num / total * 10000) / 100.00); }设置$.ajax({   crossDomain: true }) 此时服务端端口要小于等于14000

 图片轮播js示例：

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next(); var step = 0; function next() {   switch (step) {     case 0:      document.getElementById('btn_explode').onclick();       break;     case 1:       document.getElementById('btn_tile').onclick();       break;     case 2:             document.getElementById('btn_bars').onclick();       break;     case 3:       document.getElementById('btn_cube').onclick();       break;        case 4:       document.getElementById('btn_turn').onclick();       break;     default:       step = -1;           }   ++step;   if(step==5){     step=0;   }   setTimeout(next, 2000); }

 时间字符串如：（"2015/09/09 12:12:00"）转 2015/09/09

var t = new Date("2015/09/09 12:12:00");
alert(t.toLocaleDateString());

 jq 获取 table 指定列

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var arr = [ ]; $($0).find('tr:gt(0)>td:nth-child(2)').each(function (index) {   arr.push({     'key': index + 1,     'title': this.innerText   }); }) console.log(JSON.stringify(arr));