Issues with a double click in a draggable item. HELP PLEASE!!!!

Issues with a double click in a draggable item. HELP PLEASE!!!!

this is the code i have and i need to also add a double click to add to shopping cart option but keep the draggable functionality. can anyone help me please im stuck.

$(".product img").draggable({
containment: 'document',
opacity: 0.6,
revert: 'invalid',
helper: 'clone',
zIndex: 100
});

$("div.content.drop-here").droppable({
                        drop:
function(e, ui)
{
      var param = $(ui.draggable).attr('src');
if($.browser.msie && $.browser.version=='6.0')
{
param = $(ui.draggable).attr('style').match(/src=\"([^\"]+)\"/);
param = param[1];
}

addlist(param);
}
});
});