Drag and Drop in jQuery using Touchevent (iPhone browser) - iphone

Question

I using jQuery to listen to the touchstart,touchmove and touchend, and I able to drag the 'dragitem' in iphone Safari(position change that base on the touchmove). But now the issue is how i can make the dropArea response when the 'dragitem' drag to the 'dropArea'.
For example the 'dropArea' will highlight/glow, change background color, and etc when the 'dragitem' is drag within the 'dropArea', but when it is away the 'dropArea' will remain normal. Any idea?
Thank in advance.
HTML:
<div class='dragArea' >
<div id='box1' class='dragitem'>
</div>
<div id='box2' class='dragitem'>
</div>
</div>
<div class='dropArea'></div>
jQuery:
var startTouchX = null;
var startTouchY = null;
var moveTouchX = null;
var moveTouchY = null;
var startPositionX = null;
var startPositionY = null;
$('.dragitem').bind('touchstart',function(event){
event.preventDefault();
var e = event.originalEvent;
startTouchX = e.targetTouches[0].pageX;
startTouchY = e.targetTouches[0].pageY;
startPositionX = $(this).css('left');
startPositionY = $(this).css('top');
});
$('.dragitem').bind('touchmove', function(event){
event.preventDefault();
var e = event.originalEvent;
moveTouchX = e.targetTouches[0].pageX;
moveTouchY = e.targetTouches[0].pageY;
$('#movex').text(moveTouchX);
$('#movey').text(moveTouchY);
$(this).css({top: (moveTouchY - 50), left: (moveTouchX - 5)});
});
$('.dragitem').bind('touchend', function(event){
$(this).animate({top: startPositionY, left: startPositionX}, 'fast');
});

Answer 1

i would check the offset() of the $('.dragitem') array and $('.dropArea.') in the move Handler ... or an interval.