function show_user_comments(username) {
	var spans = comments.getElementsByTagName('span')
	for(i=0; i <spans.length;i++)
	{
		if(spans[i].className != username)
		spans[i].style.display = 'none';
	}
	document.all.all_comments.style.display='inline';
}

function show_all_comments() {
	var spans = comments.getElementsByTagName('span')
	for(i=0; i <spans.length;i++)
	{
		spans[i].style.display = 'inline';
	}
	document.all.all_comments.style.display='none';
}

function highlight_owncomments(username) {
	var tables = comments.getElementsByTagName('table')
	for(i=0; i <tables.length;i++)
	{
		if(tables[i].className == 'owncomment')
		tables[i].className = 'highlight_owncomment';
	}
}