text: var currentX = '';
  var currentY = '';
  var movementConstant = 0.015; 
  $(document).mousemove(function(e) {
    if(currentX == '') currentX = e.pageX;
    var xdiff = e.pageX - currentX;
    currentX = e.pageX;
     if(currentY == '') currentY = e.pageY;
    var ydiff = e.pageY - currentY;
    currentY = e.pageY; 
    $('.parallax div').each(function(i, el) {
        var movement = (i + 1) * (xdiff * movementConstant);
  	  var movementy = (i + 1) * (ydiff * movementConstant);
        var newX = $(el).position().left + movement;
  	  var newY = $(el).position().top + movementy;
        $(el).css('left', newX + 'px');
  	  $(el).css('top', newY + 'px');
    });
  });