//广告脚本文件 AdMove.js
/*
例子
<div id="Div2">
***** content ******
</div>
var ad=new AdMove("Div2");
ad.Run();
*/
////////////////////////////////////////////////////////
var AdMoveConfig = new Object();
AdMoveConfig.IsInitialized = false;
AdMoveConfig.ScrollX = 0;
AdMoveConfig.ScrollY = 0;
AdMoveConfig.MoveWidth = 0;
AdMoveConfig.MoveHeight = 0;
AdMoveConfig.Resize = function() {
    var winsize = GetPageSize();
    AdMoveConfig.MoveWidth = winsize[2];
    AdMoveConfig.MoveHeight = winsize[3];
    AdMoveConfig.Scroll();
}
AdMoveConfig.Scroll = function() {
    var winscroll = getPageScroll();
    AdMoveConfig.ScrollX = winscroll[0];
    AdMoveConfig.ScrollY = winscroll[1];
}
addEvent(window, "resize", AdMoveConfig.Resize);
addEvent(window, "scroll", AdMoveConfig.Scroll);
function AdMove(id) {
    if (!AdMoveConfig.IsInitialized) {
        AdMoveConfig.Resize();
        AdMoveConfig.IsInitialized = true;
    }
    var obj = document.getElementById(id);
    obj.style.position = "absolute";
    var W = AdMoveConfig.MoveWidth - obj.offsetWidth;
    var H = AdMoveConfig.MoveHeight - obj.offsetHeight;
    var x = W * Math.random(), y = H * Math.random();
    var rad = (Math.random() + 1) * Math.PI / 6;
    var kx = Math.sin(rad), ky = Math.cos(rad);
    var dirx = (Math.random() < 0.5 ? 1 : -1), diry = (Math.random() < 0.5 ? 1 : -1);
    var step = 1;
    var interval;
    this.SetLocation = function(vx, vy) { x = vx; y = vy; }
    this.SetDirection = function(vx, vy) { dirx = vx; diry = vy; }
    obj.CustomMethod = function() {
        obj.style.left = (x + AdMoveConfig.ScrollX) + "px";
        obj.style.top = (y + AdMoveConfig.ScrollY) + "px";
        rad = (Math.random() + 1) * Math.PI / 6;
        W = AdMoveConfig.MoveWidth - obj.offsetWidth;
        H = AdMoveConfig.MoveHeight - obj.offsetHeight;
        x = x + step * kx * dirx;
        if (x < 0) { dirx = 1; x = 0; kx = Math.sin(rad); ky = Math.cos(rad); }
        if (x > W) { dirx = -1; x = W; kx = Math.sin(rad); ky = Math.cos(rad); }
        y = y + step * ky * diry;
        if (y < 0) { diry = 1; y = 0; kx = Math.sin(rad); ky = Math.cos(rad); }
        if (y > H) { diry = -1; y = H; kx = Math.sin(rad); ky = Math.cos(rad); }
    }
    this.Run = function() {
        var delay = 25; //移动速度
        interval = setInterval(obj.CustomMethod, delay);
        obj.onmouseover = function() { clearInterval(interval); }
        obj.onmouseout = function() { interval = setInterval(obj.CustomMethod, delay); }
    }
}