var xmlHttp;

function prepareAjax() {
		try {
			//Firefox, Opera 8.0+, Safari
			xmlHttp=new XMLHttpRequest();
		} catch (e) {
			//Internet Explorer
			try {
				xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
			try {
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
}

function ajax(url) {
	prepareAjax();
	
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) {
			eval(xmlHttp.responseText);
		}
	}
	
	xmlHttp.open("GET", url, true);
	xmlHttp.send(null);
}

function ajaxParam(url, parameters) {
	prepareAjax();
	
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) {
			eval(xmlHttp.responseText);
		}
	}
	
	xmlHttp.open('POST', url, true);
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", parameters.length);
	xmlHttp.setRequestHeader("Connection", "close");
	xmlHttp.send(parameters);
}

function ajaxDiv(url, element) {
	prepareAjax();
	
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) {
			document.getElementById(element).innerHTML = xmlHttp.responseText;
		}
	}
	
	xmlHttp.open("GET", url, true);
	xmlHttp.send(null);
}

function ajaxParamDiv(url, element, parameters) {
	prepareAjax();
	
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) {
			document.getElementById(element).innerHTML = xmlHttp.responseText;
		}
	}
	
	xmlHttp.open('POST', url, true);
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", parameters.length);
	xmlHttp.setRequestHeader("Connection", "close");
	xmlHttp.send(parameters);
}