原始ajax

var myReq;
	if(window.ActiveXObject){//IE浏览器
		try{
			myReq = new ActiveXObject("Msxml2.XMLHTTP");//IE高版本
		}catch(e){
			myReq = new ActiveXObject("Microsoft.XMLHTTP");//IE低版本
		}
	}else if(window.XMLHttpRequest){//firefox、或其它的浏览器
		myReq = new XMLHttpRequest();
	}else{
		alert('此浏览器不支持AJAX，请换浏览器！');
	}
		    if (myReq){ //发送请求
		
				myReq.onreadystatechange=function(){
					if (myReq.readyState==4 && myReq.status==200){														
						if(myReq.responseText == 1) {//正确信息		
							submitForm();					
						}else {
							alert("操作失败，该英文名的分类已经存在！");
							ename.focus();
							return false ;
						}	   		
		             }
		        }
				myReq.open('GET', "categoryCKename.jsp?"+"nodeId="+nodeId+"&ename="+ename.value); 
		        myReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');		   
				myReq.send("nodeId="+nodeId+"&ename="+ename.value+"&t="+new Date().getTime());		
		 	}	
		 	
		}