文字列をフェードイン・アウトする 　　　　　
Sample




ソース 
<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!--
function setup_strings() {
  text = "JavaScript★Tips";
  var x=navigator.appVersion;
  y=x.substring(0,4);
  if(y>=4)color_effect();
}
var isNav=(navigator.appName.indexOf("Netscape")!=-1);
var colors=new Array(
"FFFFFF","FFFFFF","FFFFFF","FFFFFF","FFFFFF","FFFFFF",
"FFFFFF","F9F9F9","F1F1F1","E9E9E9","E1E1E1","D9D9D9",
"D1D1D1","C9C9C9","C1C1C1","B9B9B9","B1B1B1","A9A9A9",
"A1A1A1","999999","919191","898989","818181","797979",
"717171","696969","616161","595959","515151","494949",
"414141","393939","313131","292929","212121","191919",
"111111","090909","000000")

a=0,b=1;
function color_effect() {
  color=colors[a];
  aa="<font color="+color+">" + text + "</font>"
  if(isNav) {
    document.obj1.document.write(aa);
    document.obj1.document.close();
  }
  else obj1.innerHTML=aa;
  a+=b;
  if (a==38) b-=2;
  if (a==0) b+=2;
  xx=setTimeout("color_effect()",10);
}
//-->
</SCRIPT>
<BODY onLoad="setup_strings()">
<div id="obj1" style="position:absolute; visibility:show; left:460px; top:200px; z-index:4"></div>
</BODY>
</HTML>
ワンポイント解説
text = "JavaScript★Tips";　が、表示される文字列
var colors=new Array(　が、変化する色の配列なので、これを変えてみてください。