function checkHight() {
	if (document.getElementById('content_main')) {
		var h = document.getElementById('content_main').offsetHeight;
	} else {
		var h = document.getElementById('contentbreit').offsetHeight;
	}
	var hl = document.getElementById('left').offsetHeight;
	if (document.getElementById('teaser')) {
		var hr = document.getElementById('teaser').offsetHeight;
	} else {
		var hr = 0;
	}
	if (hl > h) {h = hl}
	if (hr > h) {h = hr}
	document.getElementById('left').style.height =  (h+3)+'px';
	if (document.getElementById('teaser')) {
		document.getElementById('teaser').style.height = (h+3)+'px';
	}
}