function ajaxSend(url , changeObjId , formAction , showBox){
	var objId = changeObjId;
	var xmlHttp = false;
	if(window.ActiveXObject){
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if(window.XMLHttpRequest){
		xmlHttp = new XMLHttpRequest();
	}

	if (xmlHttp){
		xmlHttp.open(formAction, url, true);
		if(!changeObjId == ""){
			xmlHttp.onreadystatechange = function(){
				if (xmlHttp.readyState == 4 && xmlHttp.status == 200){
					if(showBox){
						Tip(xmlHttp.responseText);
					} else {
						document.getElementById(changeObjId).innerHTML = xmlHttp.responseText;
					}
					delete xmlHttp;
					xmlHttp = null;
				}
			}
		}
		xmlHttp.send(null);	
	}
}