<!DOCTYPE html><html><head><script>
function boom()
{
var a = document.getElementsByTagName('div')[0];
var b = a.firstChild;
var r = document.createRange();
r.setStart(b, 1);
r.setEnd(a, 1);
var s = document.createRange();
s.setStart(b, 0);
s.setEnd(a, 1);
s.deleteContents();
}
</script></head><body onload="boom();">
<div>b</div>
</body></html>