脚本不适用于 FF

Question

Plugin's code is(i use this script - http://www.tanabi.com/js/jquery.imagemap.js ):

if(typeof ev.originalTarget.actualPosX == 'undefined'){
     jQuery.imagemap.ffGetPosition(ev.originalTarget);
}

i have an error on Firefox - ev.originalTarget is undefined , at 86 line

and my code:

jQuery.fn.imagecoords = function() {
    return this.each(function(){
        jQuery(this).click(function(ev){
                        //var coords;
            var x = jQuery.imagemap.getEventX(ev);
            var y = jQuery.imagemap.getEventY(ev);
                        jQuery('#x').val(x+4);
                        jQuery('#y').val(y+2);
                        jQuery('#new_point').remove();
                        jQuery('#map').append('<a href="javascript:void(0)" id="new_point" class="bullet" rel="' + x + '-' + y + '" style="left: ' + x + 'px; top: ' + y + 'px; display: block; ">&nbsp;</a>');
                        return 0;
        });
    });
};

Answer 1

You can use the event.target of jQuery. http://api.jquery.com/category/events/event-object/#event.target

Answer 2

Your problem is that what jQuery is handing you is NOT the actual event object but some jQuery wrapper object around the real thing. You probably want ev.originalEvent.originalTarget here.

Answer 3

You need to check if ev.originalTarget is defined before accessing ev.originalTarget.something.

if(ev.originalTarget) { 
    if(typeof ev.originalTarget.actualPosX == 'undefined') {
        jQuery.imagemap.ffGetPosition(ev.originalTarget);
    }
}
else {
    // Handle undefined or null originalTarget
}

You could also use

if (typeof(ev.originalTarget) != 'undefined' && ev.originalTarget != null)

instead of

if(ev.originalTarget)

but if(ev.originalTarget) will be faster.