function setTall() {
  if (document.getElementById('content-left') && document.getElementById('content-middle')) {
	  var divs = new Array(document.getElementById('content-left'), document.getElementById('content-middle'));
  } else {
	  var divs = new Array(document.getElementById('content-shop-left'), document.getElementById('content-shop'));
  }
	if (document.all) {
  	var maxHeight = document.documentElement.clientHeight-150;
	} else {
	  var maxHeight = window.innerHeight-150;
	}


	for (var i = 0; i < divs.length; i++) {
		if (divs[i].offsetHeight > maxHeight) {
      maxHeight = divs[i].offsetHeight;
    }
	}

	for (var i = 0; i < divs.length; i++) {
    var newHeight = maxHeight;
    if (divs[i].id == 'content-shop-left') newHeight += 40;
		divs[i].style.height = newHeight + 'px';

		if (divs[i].offsetHeight > newHeight) {
			divs[i].style.height = newHeight - (divs[i].offsetHeight - newHeight) + 'px';
		}
	}
}

window.onload = setTall;
window.onresize = setTall;