/*
* jQuery Plugins Float
* 使用说明：
*   speed //元素移动速度,越大越慢,建议在3-10 之间
*   xPos  //元素一开始左距离
*   yPos  //元素一开始上距离
*   $('#div1').imgFloat({speed:30,xPos:10,yPos:10});  
*   $('#div2').imgFloat();   //不给参数默认（speed:10,xPos:0,yPos:0）                     
*/
(function ($) {
    jQuery.fn.Float = function (options) {
        var own = this;
        var xD = 0;
        var yD = 0;
        var i = 1;
        var settings = {
            speed: 10,
            xPos: 0,
            yPos: 0
        };
        jQuery.extend(settings, options);
        var ownTop = settings.xPos;
        var ownLeft = settings.yPos;
        own.css({
            position: "absolute",
            cursor: "pointer"
        });
        function objPosition() {
            var winWidth = $(window).width() - own.width();
            var winHeight = $(window).height() - own.height();
            if (xD == 0) {
                ownLeft += i;
                own.css({
                    left: ownLeft
                });
                if (ownLeft >= winWidth) {
                    ownLeft = winWidth;
                    xD = 1;
                }
            }
            if (xD == 1) {
                ownLeft -= i;
                own.css({
                    left: ownLeft
                });
                if (ownLeft <= 0) xD = 0;
            }
            if (yD == 0) {
                ownTop += i;
                own.css({
                    top: ownTop
                });
                if (ownTop >= winHeight) {
                    ownTop = winHeight;
                    yD = 1;
                }
            }
            if (yD == 1) {
                ownTop -= i;
                own.css({
                    top: ownTop
                });
                if (ownTop <= 0) yD = 0;
            }
        }
        var imgHover = setInterval(objPosition, settings.speed);
        own.hover(function () {
            clearInterval(imgHover);
        },
        function () {
            imgHover = setInterval(objPosition, settings.speed);
        });
    }
})(jQuery);