// JavaScript Document
function replaceText(el , text){
	if (el != null){
		clearText(el);
		var newNode = document.createTextNode(text);
		el.appendChild(newNode);
	}
}
function clearText(el){
	if (el != null){
		for (var i =0 ; i < el.childNodes.length; i++){
			var childNode = el.childNodes[i];
			el.removeChild(childNode);
		}
	}
}
function getText(el){
	var text="";
	if (el != null){
		if (el.childNodes) {
			for (i = 0 ; i < el.childNodes.length ; i++){
				var childNode=el.childNodes[i];
				if (childNode.nodeValue != null) {
					text = text + childNode.nodeValue;
				}
			}
		}
	}
	return text ;
}
function replaceHtml(el , text){
	if (el != null){
		clearText(el);
		var newNode = document.createTextNode(text);
		el.innerHTML=text;
	}
}