How do I avoid a click event firing after dragging a gridster.js widget with clickable content?

I'm using Gridster (http://gridster.net/) which able to drag the content inside the li . In my li there is a clickable div.

<li data-row="1" data-col="1" data-sizex="2" data-sizey="1">
    <a href=' '>
    <div>
       content
    </div>
    </a>
</li>

so here is the problem I'm facing, when I stop and release the dragging, it will invoke the click in the div, how can I just dragging the div, but not invoking the click after drag stop&release. I do not want it to redirect to another page after dragging( user drag and release ..since when drag,it need to click the div,meanwhile, the div can be clicked, so when stop&release the drag, it will invoke the click )

$(function(){ //DOM Ready

    var gridster = $(".gridster ul").gridster(
    {
          widget_margins: [5, 5],
        widget_base_dimensions: [128, 130],
        max_size_y: 2,
        max_size_x: 2,
        extra_cols: 6
    }
    ).data('gridster');
    //which i tried but failed
    gridster.draggable.stop(){
        onclick = "false";
    }


//   gridster.resize_widget($('.gridster li').eq(0), 1,1);

});

or anyone can give hints about how to invoke or use the function that provided by gridster

draggable.stop: function(event, ui){} A callback for when dragging stops.

I guess there will be some implementation on here.

initial solution but still not working yet

    var gridster ,draggable ;
   $(function () {
        gridster = $(".gridster > ul").find("> li ").click(function(e){
            !draggable && alert(1) //ipad2 ，not show alert
            draggable=0;
            alert(draggable);
            }).end()
            .gridster({widget_margins: [5, 5],
            widget_base_dimensions: [128, 130],min_cols: 10,min_rows: 20
            ,serialize_params: function($w, wgd) {
                return {
                    id: wgd.el[0].id
                    //,col: wgd.col
                    //,row: wgd.row
                };
            }
            ,draggable: {
                start:function(event, ui){ 
                //  alert("hekio);");
                    draggable=1; }
            }
        }).data('gridster');
    //gridster.disable();
//   gridster.resize_widget($('.gridster li').eq(0), 1,1);
         if(!dragged){
            $("a#blue.grid").click(function(){
            window.location = '../yokotachi/category_list.php?category=yokosmart';
        });
            }
    // RESET DRAGGED SINCE CLICK EVENT IS FIRED AFTER drag stop
            dragged = 0
    });

I fixed it with a trigger variable: var dragged = 0 Add the following to your gridster initialization which sets the variable to 1 on drag start:

...
    draggable: {
        start: function(event, ui) {

            dragged = 1;
            // DO SEOMETHING
        }
    }
....

In your click event on the same object, check:

...
    if(!dragged){
        // DO SOMETHING
    }
    // RESET DRAGGED SINCE CLICK EVENT IS FIRED AFTER drag stop
dragged = 0
....