co-ordinates.js

$('.full_wrap').mousedown(function(e) {
    // get container co ordinates
    var tcw= $('.tags_container.stores_only').width(),
        tch= $('.tags_container.stores_only').height(),
        tct= $('.tags_container.stores_only').offset().top,
        tcl= $('.tags_container.stores_only').offset().left;

    // calculate selectable zone
    var xCoordsMin = tcl,
        xCoordsMax = tcl + tcw,
        yCoordsMin = tct,
        yCoordsMax = tct + tch;

    // only trigger if a click occurs outside of the selectable zone,
    // clicks that occur within the selectable zone are handled
    // by jquery ui.

    if(yCoordsMax > e.pageY <  yCoordsMin && xCoordsMax > e.pageX <  xCoordsMin) {
       if(!$(e.toElement).parent().hasClass('ui-selectee')) {
           $('.ui-selected').removeClass('ui-selected');
           $('.ui-click-select').removeClass('ui-click-select');
           $('#drag_multiple_button').hide();
       }
    } else {
        console.log('in');
    }
});