<SCRIPT LANGUAGE=javascript>
var obj;
function ok()
{
if(obj!=null){obj.style.color="black";}
var b_tag=document.getElementsByTagName("B");
var x=parseInt(10 * Math.random());
obj=document.createElement("B");
obj.style.color="red";
obj.innerText=x;
if(b_tag.length>0)
{
var b_length=b_tag.length;
var flag=false;