HELP? Down ảnh từ js

[B][COLOR=#0000FF]<a id="[/COLOR][COLOR=#FF0000]print-button[/COLOR][COLOR=#0000FF]"   class="btn btn-info" href="javascript: void(0);">[/COLOR][COLOR=#FF0000]LƯU ẢNH[/COLOR][COLOR=#0000FF]</a>
<script type="text/javascript">[/COLOR]
...
[COLOR=#0000FF]$('#[/COLOR][COLOR=#FF0000]print-button[/COLOR][COLOR=#0000FF]').click(function(){
        fpd.[/COLOR][COLOR=#FF0000]saveImage[/COLOR][COLOR=#0000FF]();
        return false;
      });[/COLOR]
...
[COLOR=#0000FF]</script[/COLOR][/B]

[B][COLOR=#0000FF]this.[/COLOR][COLOR=#FF0000]saveImage[/COLOR][COLOR=#0000FF] = function() {
        
            _deselectElement();
            
            $productContainer.css('overflow', 'visible').parent().css('overflow', 'visible');            
            //render html to canvas
            $productsDom.html2canvas({
                onrendered: function (canvas) {    
                    $productContainer.css('overflow', 'hidden').parent().css('overflow', 'hidden');                
                    var popupHeight = $productContainer.height()*currentViews.length;
                    var popup = window.open('','','width='+$productContainer.width()+',height='+popupHeight+',location=no,menubar=no,scrollbars=yes,status=no,toolbar=no');
                    popup.document.title = "Save Image";
                    $(popup.document.body).append('<img src="'+canvas.toDataURL("image/png")+'" />');
                }
            });
            
        };[/COLOR][/B][COLOR=#495D60][FONT=Source Sans Pro] [COLOR=#222222][FONT=Verdana]