<script language="JavaScript1.2">     
var message="Название сайта" //specifys the title     
var message=message+" " //gives a pause at the end,1 space=1 speed unit, here I used 10 spaces@150 each = 1.5seconds.      
i="0" //declares the variable and sets it to start at 0     
var temptitle="" //declares the variable and sets it to have no value yet.     
var speed="150" //the delay in milliseconds between letters     

function titler(){     
if (!document.all&&!document.getElementById)     
return     
document.title=temptitle+message.charAt(i) //sets the initial title     
temptitle=temptitle+message.charAt(i) //increases the title by one letter     
i++ //increments the counter     
if(i==message.length) //determines the end of the message     
{     
i="0" //resets the counter at the end of the message     
temptitle="" //resets the title to a blank value     
}     
setTimeout("titler()",speed) //Restarts. Remove line for no-repeat.     
}     

window.onload=titler     
</script>