function AddBlock(ParentElement, NewElementId, srtTemplate){
	var newElement = document.createElement("div");
	var BlockNum = ParentElement.childNodes.length+1;

	newElement.setAttribute('id',NewElementId+BlockNum);
	ParentElement.appendChild(newElement);
	newElement.innerHTML = srtTemplate;
}

function DelBlock(ParentElement){
	var BlockNum = ParentElement.childNodes.length;
	if (BlockNum > 0) {
		var newElement = ParentElement.childNodes[BlockNum-1];
		ParentElement.removeChild (newElement);
	}
}