function replaceText(el, text){
	if (el != null) {
		clearText(el);
		var newNode = document.createTextNode(text);
		el.appendChild(newNode);
	}
}
function replaceTextWithHTML(el, text){
	if(el != null){
		clearText(el);
		el.innerHTML = text;
		
	}
}
function clearText(el){
	var alertText;
	if (el != null) {
		if (el.childNodes) {
			i = el.childNodes.length;
			while(i>0){
				var j=i-1;
				var childNode = el.childNodes[j];
				el.removeChild(childNode);
				i--;
			}
		} 
	}
}
function getText(el) {
	var text = "";
	if (el != null) {
		if (el.childNodes) {
			i = el.childNodes.length;
			while(i>0){
				var j=i-1;
				var childNode = el.childNodes[j];
				if(childNode.nodeValue != null){
					text = text + childNode.nodeValue;
				}
				i--;
			}
		}	
	}
	return text;
}