一段彩色的文字

下面框中为脚本显示区

always wanted to be a genius?
...well...do it, in...
snazzy, eyecatching, gradient colors!
but uhm, just be careful not to overdo it

脚本说明：
把如下代码加入<body>区域中:
<SCRIPT language="JavaScript">

var browser = "unknown";
var version = 0;

if (navigator.userAgent.indexOf("Opera") >= 0)
 browser = "opera";
else if (navigator.userAgent.indexOf("obot") >= 0)
 browser = "robot";
else if (navigator.appName.indexOf("etscape") >= 0)
 browser = "netscape";
else if (navigator.appName.indexOf("icrosoft") >= 0)
 browser = "msie";

version = parseFloat(navigator.appVersion);
if (isNaN(version)) version = 0;
if ((browser == "msie")&&(version == 2)) version = 3;

// lookup table
var tohex = new Array(256);
var hex = "0123456789ABCDEF";
var count = 0;
for (x=0; x<16; x++) {
 for (y=0; y<16; y++) {
 tohex[count] = hex.charAt(x) + hex.charAt(y);
 count++;
 }
}

//ColorCode constructor
function ColorCode(hexcode) {
  if (hexcode.length == 7) {
    this.r = parseInt(hexcode.substring(1,3),16);
    this.g = parseInt(hexcode.substring(3,5),16);
    this.b = parseInt(hexcode.substring(5,7),16);
  }
  else if (hexcode.length == 6) {
    this.r = parseInt(hexcode.substring(0,2),16);
    this.g = parseInt(hexcode.substring(2,4),16);
    this.b = parseInt(hexcode.substring(4,6),16);
  }
  else {
    this.r = this.g = this.b = 0;
    alert("Error: ColorCode constructor failed");
  }
  if (isNaN(this.r)||isNaN(this.g)||isNaN(this.b))
    alert("Error: ColorCode constructor failed");
}

// ColorList constructor
function ColorList(hexcodes) {
  var i = 0;
  var c = 0;
  this.codes = new Array(Math.round(hexcodes.length/7));
  while (i < hexcodes.length) {
    if (isNaN(parseInt(hexcodes.substring(i,i+6),16))) ++i;
    else {
      this.codes[c] = new ColorCode(hexcodes.substring(i,i+6));
      i += 7;
      ++c;
    }
  }
  this.len = c;
}

function interpolate (x1, y1, x3, y3, x2) {
  if (x3 == x1) return y1
  else return (x2-x1)*(y3-y1)/(x3-x1) + y1
}

// x=index of letter, y=number of letters, z=number of colors
function lowcolorindex (x, y, z) {
  if (y == 1) return 0
  else return Math.floor( (x*(z-1))/(y-1) )
}

function hicolorindex (x, y, z, low) { 
  if ( low*(y-1) == x*(z-1) ) return low
  else if (y == 1) return 0
  else return Math.floor( (x*(z-1))/(y-1) + 1 )
}

</SCRIPT>
<SCRIPT language="JavaScript">
gradient("always wanted to be a genius?","FF0000 FFFFFF 0000FF");
document.write('<BR>');
gradient("...well...do it, in...","444444 DDDDDD 444444");
document.write('<BR><FONT size=+1><TT><B>');
gradient("snazzy, eyecatching, gradient colors!","FF8888 FFFF88 88FF88 88FFFF 8888FF FF88FF");
document.write('</B></TT></FONT><BR><FONT size=2>');
gradient("but uhm, just be careful not to overdo it","884488 444488 448888 448844 888844 884444");
document.write("</FONT><BR>");
</SCRIPT>