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从天而降的文字

稿源：互联网 2022-05-14 07:57:33 点击： 532 撤稿纠错

从天而降的文字，很多朋友都一直在找的特效，阿里西西这里有。

以下讨论的是和特效相关的从天而降的文字教程文章，内容是本站精心挑选整理的教程，希望对广大的网友给到帮助,下面是详细内容：

脚本代码(For Alixixi.com)如下:

<html>
<head>
<title>阿里西西网页特效演示，从天而降的文字</title>
</head><body onload="dynAnimation8()">


<script LANGUAGE="JavaScript" FPTYPE="dynamicanimation8">
<!--

dynamicanimAttr = "dynamicanimation8"
  animateElements = new Array()
  currentElement = 0
  speed = 0
  stepsZoom = 8
  stepsWord = 8
  stepsFly = 12
  stepsSpiral = 16
  steps = stepsZoom
  step = 0
  outString = ""
  function dynAnimation8()
  {
    var ms = navigator.appVersion.indexOf("MSIE")
    ie4 = (ms>0) && (parseInt(navigator.appVersion.substring(ms+5, ms+6)) >= 4)
    if(!ie4)
    {
      if((navigator.appName == "Netscape") &&
         (parseInt(navigator.appVersion.substring(0, 1)) >= 4))
      {
        for (index=document.layers.length-1; index >= 0; index--)
        {
            layer=document.layers[index]
            if (layer.left==10000)
                layer.left=0
        }
      }
      return
    }
    for (index=document.all.length-1; index >= document.body.sourceIndex; index--)
    {
      el = document.all[index]
      animation = el.getAttribute(dynamicanimAttr, false)
      if(null != animation)
      {
        if(animation == "dropWord" || animation == "flyTopRightWord" || animation == "flyBottomRightWord")
        {
          ih = el.innerHTML
          outString = ""
          i1 = 0
          iend = ih.length
          while(true)
          {
            i2 = startWord(ih, i1)
            if(i2 == -1)
              i2 = iend
            outWord(ih, i1, i2, false, "")
            if(i2 == iend)
              break
            i1 = i2
            i2 = endWord(ih, i1)
            if(i2 == -1)
              i2 = iend
            outWord(ih, i1, i2, true, animation)
            if(i2 == iend)
              break
            i1 = i2
          }
          document.all[index].innerHTML = outString
          document.all[index].style.posLeft = 0
          document.all[index].setAttribute(dynamicanimAttr, null)
        }
        if(animation == "zoomIn" || animation == "zoomOut")
        {
          ih = el.innerHTML
          outString = "<SPAN " + dynamicanimAttr + "="" + animation + "" style="position: relative; left: 10000;">"
          outString += ih
          outString += "</SPAN>"
          document.all[index].innerHTML = outString
          document.all[index].style.posLeft = 0
          document.all[index].setAttribute(dynamicanimAttr, null)
        }
      }
    }
    i = 0
    for (index=document.body.sourceIndex; index < document.all.length; index++)
    {
      el = document.all[index]
      animation = el.getAttribute(dynamicanimAttr, false)
      if (null != animation)
      {
        if(animation == "flyLeft")
        {
          el.style.posLeft = 10000-offsetLeft(el)-el.offsetWidth
          el.style.posTop = 0
        }
        else if(animation == "flyRight")
        {
          el.style.posLeft = 10000-offsetLeft(el)+document.body.offsetWidth
          el.style.posTop = 0
        }
        else if(animation == "flyTop" || animation == "dropWord")
        {
          el.style.posLeft = 0
          el.style.posTop = document.body.scrollTop-offsetTop(el)-el.offsetHeight
        }
        else if(animation == "flyBottom")
        {
          el.style.posLeft = 0
          el.style.posTop = document.body.scrollTop-offsetTop(el)+document.body.offsetHeight
        }
        else if(animation == "flyTopLeft")
        {
          el.style.posLeft = 10000-offsetLeft(el)-el.offsetWidth
          el.style.posTop = document.body.scrollTop-offsetTop(el)-el.offsetHeight
        }
        else if(animation == "flyTopRight" || animation == "flyTopRightWord")
        {
          el.style.posLeft = 10000-offsetLeft(el)+document.body.offsetWidth
          el.style.posTop = document.body.scrollTop-offsetTop(el)-el.offsetHeight
        }
        else if(animation == "flyBottomLeft")
        {
          el.style.posLeft = 10000-offsetLeft(el)-el.offsetWidth
          el.style.posTop = document.body.scrollTop-offsetTop(el)+document.body.offsetHeight
        }
        else if(animation == "flyBottomRight" || animation == "flyBottomRightWord")
        {
          el.style.posLeft = 10000-offsetLeft(el)+document.body.offsetWidth
          el.style.posTop = document.body.scrollTop-offsetTop(el)+document.body.offsetHeight
        }
        else if(animation == "spiral")
        {
          el.style.posLeft = 10000-offsetLeft(el)-el.offsetWidth
          el.style.posTop = document.body.scrollTop-offsetTop(el)-el.offsetHeight
        }
        else if(animation == "zoomIn")
        {
          el.style.posLeft = 10000
          el.style.posTop = 0
        }
        else if(animation == "zoomOut")
        {
          el.style.posLeft = 10000
          el.style.posTop = 0
        }
        else
        {
          el.style.posLeft = 10000-offsetLeft(el)-el.offsetWidth
          el.style.posTop = 0
        }
        el.initLeft = el.style.posLeft
        el.initTop = el.style.posTop
        animateElements[i++] = el
      }
    }
    window.setTimeout("animate();", speed)
  }
  function offsetLeft(el)
  {
    x = el.offsetLeft
    for (e = el.offsetParent; e; e = e.offsetParent)
      x += e.offsetLeft;
    return x
  } 
  function offsetTop(el)
  {
    y = el.offsetTop
    for (e = el.offsetParent; e; e = e.offsetParent)
      y += e.offsetTop;
    return y
  } 
  function startWord(ih, i)
  {
    for(tag = false; i < ih.length; i++)
    {
      c = ih.charAt(i)
      if(c == '<')
        tag = true
      if(!tag)
        return i
      if(c == '>')
        tag = false
    }
    return -1
  }
  function endWord(ih, i)
  {
    nonSpace = false
    space = false
    while(i < ih.length)
    {
      c = ih.charAt(i)
      if(c != ' ')
        nonSpace = true
      if(nonSpace && c == ' ')
        space = true
      if(c == '<')
        return i
      if(space && c != ' ')
        return i
      i++
    }
    return -1
  }
  function outWord(ih, i1, i2, dyn, anim)
  {
    if(dyn)
      outString += "<SPAN " + dynamicanimAttr + "="" + anim + "" style="position: relative; left: 10000;">"
    outString += ih.substring(i1, i2)
    if(dyn)
      outString += "</SPAN>"
  }
  function animate()
  {
    el = animateElements[currentElement]
    animation = el.getAttribute(dynamicanimAttr, false)
    step++
    if(animation == "spiral")
    {
      steps = stepsSpiral
      v = step/steps
      rf = 1.0 - v
      t = v * 2.0*Math.PI
      rx = Math.max(Math.abs(el.initLeft), 200)
      ry = Math.max(Math.abs(el.initTop),  200)
      el.style.posLeft = Math.ceil(-rf*Math.cos(t)*rx)
      el.style.posTop  = Math.ceil(-rf*Math.sin(t)*ry)
    }
    else if(animation == "zoomIn")
    {
      steps = stepsZoom
      el.style.fontSize = Math.ceil(50+50*step/steps) + "%"
      el.style.posLeft = 0
    }
    else if(animation == "zoomOut")
    {
      steps = stepsZoom
      el.style.fontSize = Math.ceil(100+200*(steps-step)/steps) + "%"
      el.style.posLeft = 0
    }
    else
    {
      steps = stepsFly
      if(animation == "dropWord" || animation == "flyTopRightWord" || animation == "flyBottomRightWord")
        steps = stepsWord
      dl = el.initLeft / steps
      dt = el.initTop  / steps
      el.style.posLeft = el.style.posLeft - dl
      el.style.posTop = el.style.posTop - dt
    }
    if (step >= steps) 
    {
      el.style.posLeft = 0
      el.style.posTop = 0
      currentElement++
      step = 0
    }
    if(currentElement < animateElements.length)
      window.setTimeout("animate();", speed)
  }
//-->
</script>
<p dynamicanimation8="dropWord"
style="position: relative !important; left: 10000 !important">
网 页 特 效 梦 工 厂 , 效 果 如 何 ?网 页 特 效 梦 工 厂 , 效 果 如 何 ?

</body></html>

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