onmouseover stop slideshow

[MDanz]

i tried this code but onmouseover it doesn't stop the the slideshow?

function nextslide() {

		// Hide current slide
          object = document.getElementById('slide' + current); //e.g. slide1
          object.style.display = 'none';
              
          // Show next slide, if last, loop back to front
          if (current == last) { current = 1; }
          else { current++ }
          object = document.getElementById('slide' + current);
          object.style.display = 'block';
	  var timeout = setTimeout(nextslide, 2500);
          object.onmouseover = clearTimeout(timeout);
          object.onmouseout = timeout;		
				
       }