function addLine(partID) {
  	var obj = $(partID);
	var line = $(partID+'_wzor');
	var newLine = document.createElement('div');
	
	newLine.innerHTML = line.innerHTML;
	inputs = newLine.getElementsByTagName('input');
	for (i in inputs) {
	inputs[i].value = '';
	}
	obj.appendChild(newLine);
}