//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 = 15;
        interval = setinterval(obj.custommethod, delay);
        obj.onmouseover = function () { clearinterval(interval); }
        obj.onmouseout = function () { interval = setinterval(obj.custommethod, delay); }
    }
}