// 在要便用漂浮体的页面上，嵌入本文件
// 并加入 <span id="softreg-moveball" style="position:absolute;"></span> 的标记，在其中加入广告内容

//设置下面一些参数，小球移动速度1-50，数值大速度快；
var ballWidth = 100;
var ballHeight = 100;
var BallSpeed = 1;

var maxBallSpeed = 50;
var xMax;
var yMax;
var xPos = 0;
var yPos = 0;
var xDir = 'right'; //水平方向向右移动
var yDir = 'down'; //垂直方向向下移动
var superballRunning = true;
var tempBallSpeed;
var currentBallSrc;
var newXDir;
var newYDir;

function initializeBall() {
	if (document.all) {
		xMax = document.body.clientWidth;
		yMax = document.body.clientHeight;
		document.all("softreg-moveball").style.visibility = "visible";
	}
	else if (document.layers) {
		xMax = window.innerWidth;
		yMax = window.innerHeight;
		document.layers["softreg-moveball"].visibility = "show";
	}
}

function moveBall() {
	if (superballRunning == true) {
		calculatePosition();
		
		if (document.all) {
			document.all("softreg-moveball").style.left = xPos + document.body.scrollLeft;
			document.all("softreg-moveball").style.top = yPos + document.body.scrollTop;
		} else
		
		if (document.layers) {
			document.layers["softreg-moveball"].left = xPos + pageXOffset;
			document.layers["softreg-moveball"].top = yPos + pageYOffset;
		}
		setTimeout('moveBall()',30);
	}
}

function calculatePosition()
{
	if (xDir == "right") {
		if (xPos > (xMax - ballWidth - BallSpeed)) { 
			xDir = "left";
		}
	} else
	
	if (xDir == "left") {
		if (xPos < (0 + BallSpeed)) {
			xDir = "right";
		}
	}
	
	if (yDir == "down") {
		if (yPos > (yMax - ballHeight - BallSpeed)) {
			yDir = "up";
		}
	} else
	
	if (yDir == "up") {
		if (yPos < (0 + BallSpeed)) {
			yDir = "down";
		}
	}
	
	/**/ if (xDir == "right")	xPos = xPos + BallSpeed;
	else if (xDir == "left")	xPos = xPos - BallSpeed;

	/**/ if (yDir == "down")	yPos = yPos + BallSpeed;
	else if (yDir == "up") 	yPos = yPos - BallSpeed;
}

if (document.all||document.layers)
window.onload = initializeBall;setTimeout('moveBall()',400);
window.onresize = initializeBall;