something similar to this without using javascript?

The script below is pretty basic I guess, it starts loading something "on blur".

<script>
window.onblur = function(){
  TIMER = setTimeout(changeItUp, 5000);
}  

window.onfocus = function(){
  if(TIMER) clearTimeout(TIMER);
}

function changeItUp()
{
  location.href = "http://www.yahoo.com"
}
</script>

So, if I want to redirect the user to something els开发者_如何学Ce after a certain period of inactivity, is there any chance to do this without using Javascript?

thanks.

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Short answer: No

Long answer: The only way to detect user activities on a page is via Javascript. No javascript, no keyup/keydown/focus/blur events to trigger on. You could do a redirect after 5 seconds using a <meta> tag redirect, but that's an unconditional redirect. No matter what the user is doing on the page, it'd still redirect after the specified time is elapsed.

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No. HTML alone does not have the ability to redirect users as a certain time period has elapsed (conditionally). You will have to use javascript.

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Meta Refresh will do something similar but only after a period of time regardless of activity...

<meta http-equiv="refresh" content="5;url=http://yahoo.com/">

Otherwise, like others stated, only JavaScript.