Vliegende Tekst met Javascript !

In mijn Marquee tutorial heb ik het ook al over 'vliegende tekst' gehad. In die tutorial heb ik de marquee-opdracht toegepast. Maar ... marquee werkt alleen maar in de Internet Explorer. Vandaar dat ik nu maar eens een javascript heb opgeduikeld. Misschien dat er dan meer browsers bereikt worden!

Dit javascript werkt in drie stappen:

1. Code tussen de head tags:

<script LANGUAGE="JavaScript" FPTYPE="mydynamicanimation"> <!-- dynamicanimAttr = "mydynamicanimation" animateElements = new Array() currentElement = 0 speed = 0 stepsZoom = 8 stepsWord = 8 stepsFly = 12 stepsSpiral = 16 steps = stepsZoom step = 0 outString = "" function mydynAnimation() { 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) } <!-- This script has been in the http://www.javascripts.com Javascript Public Library! --> <!-- Note that though this material may have been in a public depository, certain author copyright restrictions may apply. //--> </script>

2. De code voor de <body> tag:

<body onload="mydynAnimation()">

3. De code die tussen de <body> en </body> tags moet komen:

<p align="center" mydynamicanimation="flyTopRightWord" style="position: relative !important; left: 10000 !important">Hier komt de vliegende tekst !</p>

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Zie ook mijn andere vliegende tekst-tutorials:

javascript - vliegende tekst, deel 2
marquee - vliegende tekst, deel 1
marquee - vliegende tekst, deel 2

 

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