Recognize the backspace and spacebar with jQuery
$('body').keyup(function(e){
   if(e.keyCode == 8){
       // user has pressed backspace
       array.pop();
   }
   if(e.keyCode == 32){
       // user has pressed space
       array.push('');
   }
});

$(document).ready( function() {
        $('#inputid').bind('keypress', function(e) {
            if (e.which == 32){//space bar
                alert('space');
            }
            if (e.which == 8) {//backspace
                alert('back space');
            }
    });


    });