function TagChange(objstring,a,n,ClassName,nClassName,subName){
for(i=0;i<=n-1;i++)
{
obj=document.getElementById(objstring + i.toString())
if(i==a)
{
obj.className=ClassName
document.getElementById(subName + i.toString()).style.display="";
}
else
{
obj.className=nClassName
document.getElementById(subName + i.toString()).style.display="none";
}
}
}