javascript 显示文本颜色

<html> 
<head> 
        <title> 颜色变化 </title> 
</head> 
<body> 
<script   language= "javascript"> 
            var colorObj=new   Array( "Red ", "Orange ", "Yellow ", "Green ", "Blue ", "Teal ", "Purple "); 
            for (var i=0; i<colorObj.length; i++) 
            { 
                var c=colorObj[i]; 
                document.writeln( "<span style='color:"+c+"'>文字的颜色发生了变化！</span> <br>"); 
            }
</script> 
</body> 
</html>