/**
 * author levi
 * url http://levi.cg.am
 */
$(function() {
	$(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
			});
		}
	});
	
});