<!--要完成此效果需要两个步骤
第一步：把如下代码加入到<head>区域中-->
<SCRIPT LANGUAGE="JavaScript">
<!-- hide script from old browsers
var phrase = "欢迎光临网页教学网->>为您提供一切建站咨讯";
var lenPhrase = phrase.length;
var phraseOut = "";
var pause = 100;
var i=0;
var j=0;
function explode() {
i++;
phraseOut = "";
for (j=1; j<=(lenPhrase/2)-i; j++) {
phraseOut += " ";
}
for (j=1; j<=i; j++) {
phraseOut += phrase.charAt(j-1);
}
for (j=i; j>=1; j--) {
phraseOut += phrase.charAt(lenPhrase-j);
}
for (j=1; j<=(lenPhrase/2)-i; j++) {
phraseOut += " ";
}
window.status = phraseOut;
if (i<lenPhrase/2) {
setTimeout("explode()",pause);
}
}
// end hiding contents -->
</SCRIPT>
<!--第二步：把“OnLoad="explode()"”加在<body>标记里-->
<body OnLoad="explode()">
