js仿黑客帝国字母掉落效果代码分享

看过黑客帝国的朋友或许都对开头的字幕效果很熟悉，自从影片播放以来，网页设计者有不少都在模仿这种字母掉落的效果，而且最后还有文字显现效果“I love you”，你可以稍加修改，在情人节，用来对你的恋人表白哦~

运行效果图：

大家也动手运行一下，                                      ----------------效果演示----------------

为大家分享js仿黑客帝国字母掉落效果代码如下

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JS仿黑客帝国字母掉落效果</title>
<style type=text/css>
.matrix{padding-right: 0px; padding-left: 0px; font-size: 10pt; padding-bottom: 0px; margin: 0px; width: 10px; padding-top: 0px; font-family: lucida console, courier, monotype; text-align: center}
</style>
</head>
<body>
<center>JS仿黑客帝国字母掉落效果</center><br><center>

<SCRIPT language=JavaScript type=text/javascript>
var rows=11; // must be an odd number
var speed=50; // lower is faster
var reveal=2; // between 0 and 2 only. The higher, the faster the word appears
var effectalign="default" //enter "center" to center it.
var w3c=document.getElementById && !window.opera;;
var ie45=document.all && !window.opera;
var ma_tab, matemp, ma_bod, ma_row, x, y, columns, ma_txt, ma_cho;
var m_coch=new Array();
var m_copo=new Array();
window.onload=function() {
 if (!w3c && !ie45) return
 var matrix=(w3c)?document.getElementById("matrix"):document.all["matrix"];
 ma_txt=(w3c)?matrix.firstChild.nodeValue:matrix.innerHTML;
 ma_txt=" "+ma_txt+" ";
 columns=ma_txt.length;
 if (w3c) {
 while (matrix.childNodes.length) matrix.removeChild(matrix.childNodes[0]);
 ma_tab=document.createElement("table");
 ma_tab.setAttribute("border", 0);
 ma_tab.setAttribute("align", effectalign);
 ma_tab.style.backgroundColor="#000000";
 ma_bod=document.createElement("tbody");
 for (x=0; x<rows; x++) {
 ma_row=document.createElement("tr");
 for (y=0; y<columns; y++) {
 matemp=document.createElement("td");
 matemp.setAttribute("id", "Mx"+x+"y"+y);
 matemp.className="matrix";
 matemp.appendChild(document.createTextNode(String.fromCharCode(160)));
 ma_row.appendChild(matemp);
 }
 ma_bod.appendChild(ma_row);
 }
 ma_tab.appendChild(ma_bod);
 matrix.appendChild(ma_tab);
 } else {
 ma_tab='<ta'+'ble align="'+effectalign+'" border="0" style="background-color:#000000">';
 for (var x=0; x<rows; x++) {
 ma_tab+='<t'+'r>';
 for (var y=0; y<columns; y++) {
 ma_tab+='<t'+'d class="matrix" id="Mx'+x+'y'+y+'">?</'+'td>';
 }
 ma_tab+='</'+'tr>';
 }
 ma_tab+='</'+'table>';
 matrix.innerHTML=ma_tab;
 }
 ma_cho=ma_txt;
 for (x=0; x<columns; x++) {
 ma_cho+=String.fromCharCode(32+Math.floor(Math.random()*94));
 m_copo[x]=0;
 }
 ma_bod=setInterval("mytricks()", speed);
}

function mytricks() {
 x=0;
 for (y=0; y<columns; y++) {
 x=x+(m_copo[y]==100);
 ma_row=m_copo[y]%100;
 if (ma_row && m_copo[y]<100) {
 if (ma_row<rows+1) {
 if (w3c) {
 matemp=document.getElementById("Mx"+(ma_row-1)+"y"+y);
 matemp.firstChild.nodeValue=m_coch[y];
 }
 else {
 matemp=document.all["Mx"+(ma_row-1)+"y"+y];
 matemp.innerHTML=m_coch[y];
 }
 matemp.style.color="#33ff66";
 matemp.style.fontWeight="bold";
 }
 if (ma_row>1 && ma_row<rows+2) {
 matemp=(w3c)?document.getElementById("Mx"+(ma_row-2)+"y"+y):document.all["Mx"+(ma_row-2)+"y"+y];
 matemp.style.fontWeight="normal";
 matemp.style.color="#00ff00";
 }
 if (ma_row>2) {
 matemp=(w3c)?document.getElementById("Mx"+(ma_row-3)+"y"+y):document.all["Mx"+(ma_row-3)+"y"+y];
 matemp.style.color="#009900";
 }
 if (ma_row<Math.floor(rows/2)+1) m_copo[y]++;
 else if (ma_row==Math.floor(rows/2)+1 && m_coch[y]==ma_txt.charAt(y)) zoomer(y);
 else if (ma_row<rows+2) m_copo[y]++;
 else if (m_copo[y]<100) m_copo[y]=0;
 }
 else if (Math.random()>0.9 && m_copo[y]<100) {
 m_coch[y]=ma_cho.charAt(Math.floor(Math.random()*ma_cho.length));
 m_copo[y]++;
 }
 }
 if (x==columns) clearInterval(ma_bod);
}

function zoomer(ycol) {
 var mtmp, mtem, ytmp;
 if (m_copo[ycol]==Math.floor(rows/2)+1) {

 for (ytmp=0; ytmp<rows; ytmp++) {
 if (w3c) {
 mtmp=document.getElementById("Mx"+ytmp+"y"+ycol);
 mtmp.firstChild.nodeValue=m_coch[ycol];
 }
 else {
 mtmp=document.all["Mx"+ytmp+"y"+ycol];
 mtmp.innerHTML=m_coch[ycol];
 }
 mtmp.style.color="#33ff66";
 mtmp.style.fontWeight="bold";
 }
 if (Math.random()<reveal) {
 mtmp=ma_cho.indexOf(ma_txt.charAt(ycol));
 ma_cho=ma_cho.substring(0, mtmp)+ma_cho.substring(mtmp+1, ma_cho.length);
 }
 if (Math.random()<reveal-1) ma_cho=ma_cho.substring(0, ma_cho.length-1);
 m_copo[ycol]+=199;
 setTimeout("zoomer("+ycol+")", speed);
 }
 else if (m_copo[ycol]>200) {
 if (w3c) {
 mtmp=document.getElementById("Mx"+(m_copo[ycol]-201)+"y"+ycol);
 mtem=document.getElementById("Mx"+(200+rows-m_copo[ycol]--)+"y"+ycol);
 }
 else {
 mtmp=document.all["Mx"+(m_copo[ycol]-201)+"y"+ycol];
 mtem=document.all["Mx"+(200+rows-m_copo[ycol]--)+"y"+ycol];
 }
 mtmp.style.fontWeight="normal";
 mtem.style.fontWeight="normal";
 setTimeout("zoomer("+ycol+")", speed);
 }
 else if (m_copo[ycol]==200) m_copo[ycol]=100+Math.floor(rows/2);
 if (m_copo[ycol]>100 && m_copo[ycol]<200) {
 if (w3c) {
 mtmp=document.getElementById("Mx"+(m_copo[ycol]-101)+"y"+ycol);
 mtmp.firstChild.nodeValue=String.fromCharCode(160);
 mtem=document.getElementById("Mx"+(100+rows-m_copo[ycol]--)+"y"+ycol);
 mtem.firstChild.nodeValue=String.fromCharCode(160);
 }
 else {
 mtmp=document.all["Mx"+(m_copo[ycol]-101)+"y"+ycol];
 mtmp.innerHTML=String.fromCharCode(160);
 mtem=document.all["Mx"+(100+rows-m_copo[ycol]--)+"y"+ycol];
 mtem.innerHTML=String.fromCharCode(160);
 }
 setTimeout("zoomer("+ycol+")", speed);
 }
}
// -->
</SCRIPT>
<div id=matrix>I love u</div>

</center>
</body>
</html>

希望本文所述对大家的javascript程序设计有所帮助。