layer-打开和关闭-通用函数

// 打开layer弹出框// title：标题// w：款// h：高// url：地址openLayer(title,w,h,url){    var dirname = window.location.origin;    if (title == null || title == '') {        title=false;    };    if (url == null || url == '') {        url="404.html";    };    if (w == null || w == '') {        w=800;    };    if (h == null || h == '') {        h=($(window).height() - 50);    };    url =  dirname + url;    console.log(url)    layer.open({        type: 2,        title: title,        shadeClose: true, //点击遮罩关闭层        area : [w+'px', h +'px'],        content: url,        scrollbar :true    })}// 关闭layer弹出框closeLayer(){    var index = parent.layer.getFrameIndex(window.name);    parent.layer.close(index);}