问参数列表后的Javascript html字符串连接未捕获SyntaxError: missing )

EN

    function show_more(mylink) {
        console.log(mylink);
        alert(mylink);
    }

function getImages(index, stop) {
    var html = "";
    currentIndex += stop;
    // create the img tags.
    for (var i = index; i < index + stop; i++) {
      var link = "http://31stbridge.com/godson_project/uploads/" + images[i].photo_url;
       html += '<div class="grid-item"><a href="#" onclick="show_more('+ link +')"><img src="http://baseurl/path/' + images[i].photo_url + '"></a><div class = "subtitle" align="center"> <h1>' + images[i].photo_group + '</h1><form><button class="downloadbut" formaction="' + images[i].zip + '"></button></form></div></div>';
    }
    var str = $(html);
    grid.append(str);
    grid.masonry("appended", str);
  }
});