将字符串按某个字符切割成若干个字符串，并以数组形式返回

var s = "abc,abcd,aaa";ss = s.split(",");  // 在每个逗号(,)处进行分解。console.log(ss);  // ["abc", "abcd", "aaa"]

 

截取数组中_720替换为_360：

function changeLargeImg(self) {    imgClear();    $("section").show();    // 大图    var dataLargeSrc = $(self).attr("data-largesrc");    dataLargeSrc = dataLargeSrc.split(",");    var topHtml = "
     
      ";    for(var i in dataLargeSrc){        topHtml+= "
      
";    }    topHtml += "
     
";    $(".gallery-top").append(topHtml);    var btn =  "
     
     
";    $(".gallery-top").append(btn);    // 克隆,小图    var dataSrc = dataLargeSrc.slice();    var data360Src = [];    for (var i in dataSrc) {        data360Src.push(dataSrc[i].replace(/_720/, "_360")); //replace找到并替换，并返回新的数组，push放入新的数组中；    }    var thumbsHtml = "
     
      ";    for(var i in data360Src){        thumbsHtml+= "
      
";    }    thumbsHtml += "
     
";    $(".gallery-thumbs").append(thumbsHtml);    // swiper图片动效启动    var galleryTop = new Swiper('.gallery-top', {        nextButton: '.swiper-button-next',        prevButton: '.swiper-button-prev',        spaceBetween: 10    });    var galleryThumbs = new Swiper('.gallery-thumbs', {        spaceBetween: 10,        centeredSlides: true,        slidesPerView: 'auto',        touchRatio: 0.2,        slideToClickedSlide: true    });    // 双向控制    galleryTop.params.control = galleryThumbs;    galleryThumbs.params.control = galleryTop;}