var webcamimage;
var imgBase="http://porucha.osobnosti.cz/o2bar/thumbnail.jpg?"
var c = 0;

function count() {
	webcamimage.src=imgBase+(++c);
	}

function init() {
	webcamimage = document.getElementById("webcamimage");
	if( webcamimage )  {
		setInterval("count()",5000);  }

	}
window.onload = init;