function openAjax() {

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		ajax = new XMLHttpRequest();
		if (ajax.overrideMimeType) {
			ajax.overrideMimeType('text/xml');
		}
	} 
	else if (window.ActiveXObject) { // IE
		
		try {
			ajax = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e) {
			try {
				ajax = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) {}
		}
	}

	return ajax;
}

function doAjaxReplace(responseTextAjax) {
	
	responseTextAjax = unescape(responseTextAjax.replace(/\+/g," "));
	return responseTextAjax;
	
}