中间往两边显现

脚本说明:
第一步:把如下代码加入%26lt;head%26gt;区域中
%26lt;SCRIPT LANGUAGE=%26quot;JavaScript%26quot;%26gt;
%26lt;!-- hide script from old browsers
var phrase = %26quot;真诚欢迎您的光临，中国素材网sucai86.COM%26quot;;
var lenPhrase = phrase.length;
var phraseOut = %26quot;%26quot;;
var pause = 100;
var i=0;
var j=0;
function explode() {
i++;
phraseOut = %26quot;%26quot;;
for (j=1; j%26lt;=(lenPhrase/2)-i; j++) {
phraseOut += %26quot; %26quot;;
}
for (j=1; j%26lt;=i; j++) {
phraseOut += phrase.charAt(j-1);
}
for (j=i; j%26gt;=1; j--) {
phraseOut += phrase.charAt(lenPhrase-j);
}
for (j=1; j%26lt;=(lenPhrase/2)-i; j++) {
phraseOut += %26quot; %26quot;;
}
window.status = phraseOut;
if (i%26lt;lenPhrase/2) {
setTimeout(%26quot;explode()%26quot;,pause);
}
}
// end hiding contents --%26gt;
%26lt;/SCRIPT%26gt;

第二步:把如下代码写入%26lt;body%26gt;区域内
OnLoad=%26quot;explode()%26quot;
如：
%26lt;body bgcolor=%26quot;#ffffff%26quot; OnLoad=%26quot;explode()%26quot;%26gt;