24行代码，让你的网页元素任意放大、缩小、拖拽、移动

$(document).mousemove(function(e) {
if (!!this.move) {
var posix = !document.move_target ? {'x': 0, 'y': 0} : document.move_target.posix,
callback = document.call_down || function() {
$(this.move_target).css({
'top': e.pageY - posix.y,
'left': e.pageX - posix.x
});
};

callback.call(this, e, posix);
}
}).mouseup(function(e) {
if (!!this.move) {
var callback = document.call_up || function(){};
callback.call(this, e);
$.extend(this, {
'move': false,
'move_target': null,
'call_down': false,
'call_up': false
});
}
});