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利用脚本封装,方便实现网站悬浮广告

摘要: 利用脚本封装,方便实现网站悬浮广告


下面是JS脚本(floatdiv.js)

/*======================================================================
浮动块支持脚本
DESIGN BY : 彭国辉
DATE:    2004-02-26
SITE:    http://kacarton.yeah.net/
EMAIL:   kacarton@sohu.com
======================================================================*/

var alLeft = 0, alCenter = 1, alRight = 2; //水平对齐方式
var alTop = 0, alMiddle = 1, alBottom = 2; //垂直对齐方式

var f = new Array();
var cnt = 0;

function floatDiv(objId, align, vAlign, x, y, smooth)
{
  /*浮动块对象
   数据结构:
    objId: 对象ID
    align: 水平对齐方式,枚举型
    vAlign:垂直对齐方式,枚举型内容
    x, y: xy座标,整型
    smooth:平滑移动,布尔型
  */
  this.objId = objId;
  this.align = align;
  this.vAlign = vAlign;
  this.x = x;
  this.y = y;
  this.smooth = smooth;
}

function addDiv(objId, align, vAlign, x, y, smooth)
{ //添加浮动块
  f[cnt++] = new floatDiv(objId, align, vAlign, x, y, smooth);
}

function floatMove()
{ //重新定位各块位置
  var objX, objY;
  if (document.all)
  {
    var d = document.body;
//status = "scrollLeft:"+f[0].objId.style.pixelTop+"| offsetWidth:"+d.offsetWidth;
    for (var i=0; i    {
      switch (f[i].align)
      {
        case alLeft : objX = d.scrollLeft + f[i].x; break;
        case alCenter: objX = d.scrollLeft + Math.ceil((d.offsetWidth - f[i].objId.offsetWidth)/2) + f[i].x; break;
        case alRight : objX = d.scrollLeft + d.offsetWidth - f[i].x - f[i].objId.offsetWidth - 20; break; //减滚动条20
      }
      switch (f[i].vAlign)
      {
        case alTop : objY = d.scrollTop + f[i].y; break;
        case alMiddle: objY = d.scrollTop + Math.ceil((d.offsetHeight - f[i].objId.offsetHeight)/2) + f[i].y; break;
        case alBottom: objY = d.scrollTop + d.offsetHeight - f[i].y - f[i].objId.offsetHeight; break;
      }
      if (f[i].smooth) smoothMove(f[i].objId, objX, objY);
      else
      {
        f[i].objId.style.pixelLeft = objX;
        f[i].objId.style.pixelTop = objY;
      }
    }
  }
  
  if (document.layers)
  {
    for (var i=0; i    {
      var objId = f[i].objId;
      switch (f[i].align)
      {
        case alLeft : objX = pageXOffset + f[i].x; break;
        case alCenter: objX = pageXOffset + Math.ceil((window.innerWidth-objId.width)/2) + f[i].x; break;
        case alRight : objX = pageXOffset + window.innerWidth - f[i].x - document.objId.width; break;
      }
      switch (f[i].vAlign)
      {
        case alTop : objY = pageYOffset + f[i].y; break;
        case alMiddle: objY = pageYOffset + Math.ceil(window.innerHeight/2) + f[i].y; break;
        case alBottom: objY = pageYOffset + window.innerHeight - f[i].y - document.objId.height; break;
      }
      if (t[i].smooth) smoothMove(f[i].objId, objX, objY);
      else
      {
        document.objId.left = objX;
        document.objId.top = objY;
      }
    }
  }
  
  setTimeout("floatMove();",50);
}

function smoothMove(obj, x, y)
{
  var percent;
  if (document.all)
  {
    percent = .1 * (x - obj.style.pixelLeft);
    if (percent > 0) percent = Math.ceil(percent); else percent = Math.floor(percent);
    obj.style.pixelLeft += percent;
    
    percent = .1 * (y - obj.style.pixelTop);
    if (percent > 0) percent = Math.ceil(percent); else percent = Math.floor(percent);
    obj.style.pixelTop += percent;
  }
  if (document.layers)
  {
    percent = .1 * (x - document.objId.left);
    if (percent > 0) percent = Math.ceil(percent); else percent = Math.floor(percent);
    document.objId.left += percent;
    
    percent = .1 * (y - document.objId.top);
    if (percent > 0) percent = Math.ceil(percent); else percent = Math.floor(percent);
    document.objId.top += percent;
  }
}


setTimeout("floatMove();",50);

调用例子:

<script language=javascript src="floatdiv.js"></script> <script language=javascript>
if (navigator.appName == "Netscape")
{
document.write("");
}
else
{
document.write("");
}
addDiv(ad_hr, alRight, alTop, 0, 30, true);
</script> <script language="javascript" src="lib/floatdiv.js"></script>
<script language="javascript">
if (navigator.appName == "Netscape")
{
  document.write("");
}
else
{
  document.write("

");
}
addDiv(ad_hr, alRight, alTop, 0, 30, true);
</script>

</td> </tr> <tr> <td vAlign=top align=left height="100%">
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