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文字从天而降的特效
来源：
www.texiao.org.cn
作者：
cheney
时间：
08-03-13
点击：
<p www_helpor_net="dropWord" style="position: relative !important; left: 10000 !important" align="center"><font size="3" color="#ee00FF">欢 迎 光 临 特 效 代 码 站 www.texiao.org.cn 吓 到 你 了 ？</font><font size="7" face="Arial" color="#FF0000"><b>Sorry !</b></font></p> <SCRIPT language="JavaScript"> <!-- dynamicanimAttr = "www_helpor_net" animateElements = new Array() currentElement = 0 speed = 0 stepsZoom = 8 stepsWord = 8 stepsFly = 12 stepsSpiral = 16 steps = stepsZoom step = 0 outString = "" function helpor_net() { 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) } helpor_net() //--> </SCRIPT>
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