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">'; for (var x=0; x<rows; x++) { ma_tab+='<t'+'r>'; for (var y=0; y<columns; y++) { ma_tab+='<t'+'d 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。
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