文章来源： BBS.KESONIC.COM
要完成此效果把如下代码加入到<body>区域中
<script language="JavaScript">
function makeArray(n){
this.length=n
return this
}
function hexfromdec(num) {
hex=new makeArray(1);
var hexstring="";
var shifthex=16;
var temp1=num;
for(x=1; x>=0; x--) {
hex[x]=Math.round(temp1/shifthex - .5);
hex[x-1]=temp1 - hex[x] * shifthex;
temp1=hex[x-1];
shifthex /= 16;
}
for (x=1; x>=0; x--) { hexstring+=getletter(hex[x]); }
return (hexstring);
}
function getletter(num) {
if (num < 10) { return num; }
else {
if (num == 10) { return "A" }
if (num == 11) { return "B" }
if (num == 12) { return "C" }
if (num == 13) { return "D" }
if (num == 14) { return "E" }
if (num == 15) { return "F" }
}
}
function rainbow(text){
var color_d1;
var allstring="";
for(i=0;i<text.length;i=i+2){
color_d1=255*Math.sin(i/(text.length/3));
color_h1=hexfromdec(color_d1);
allstring+="<FONT COLOR="+color_h1+"ff"+color_h1+">"+text.substring(i,i+2)+"</FONT>";
}
return allstring;
}
function sizefont(text){
var color_d1;
var allstring="";
var flag=0;
for(i=0,j=0;i<text.length;i=i+1){
if (flag==0) {
j++;
if (j>=7) {
flag=1;}}
if (flag==1) {
j=j-1;
if (j<=0) {
flag=0; }}
allstring+="<FONT SIZE="+ j + ">" + text.substring(i,i+1) + "</FONT>";
}
return allstring;
}
document.write("<font size=5><CENTER>")
document.write("<BR><BR>")
document.write( sizefont("欢迎访问泥客论坛"))
document.write("</CENTER></font>")
</script>
特效演示：www.kesonic.com/kc/design/show/11.htm
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