Mobile downloads files

// download file 
    function Show () {
         var myframe = document.createElement ( 'iframes' ); 
        myFrame.src = 'http://fuyuan-net.oss-cn-hangzhou.aliyuncs.com/image/201812121109275441.xls' ; // server path 
        myFrame.style.display = 'none' ; 
        document.body.appendChild (myframe); 
    }