AJAX+Struts1.3用法

  //JS代码
  var xmlhttp;
			function getYcl(){
			    var ckName=document.getElementById("ckName").value;
				try{   
				     //IE 5.0    
				     xmlhttp = new ActiveXObject('Msxm12.XMLHTTP');   
				    }catch(e){   
			            try{   
				            //IE 5.5 及更高版本   
				            xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');   
				        	}catch(e){   
				           		try{   
				                   //其他浏览器   
				                  xmlhttp = new XMLHttpRequest();   
				            		}catch(e){}   
				        	 }   
					}
					document.getElementById("yclName").options.length=1;
					xmlhttp.open("post","ylrkTj.do?method=getYcl",true);  
					//在使用post方法提交请求时，需要设置HTTP头 
					xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
					var ckName="ckName="+ckName;
					ckName=encodeURI(ckName); //写一个不行。如果写一个就是？？？？号
					ckName=encodeURI(ckName);//写2个，则输出 %df%a4这可以
				    xmlhttp.send(ckName);   
					 //创建请求结果处理程序   
				    xmlhttp.onreadystatechange = function(){   
				        if(xmlhttp.readyState == 4){ 
				        	var str = xmlhttp.responseXML; 				  
							var item = str.getElementsByTagName("ycl"); 
							//document.getElementById("yclName").innerHTML="选择原材料";				
							for (var i = 0; i < item.length; i++){ 
								var name = item[i].getElementsByTagName("name")[0].childNodes[0].nodeValue;   					
			  					var opt = new Option(name,name);
			  					document.getElementById("yclName").add(opt);
			  					} 
//ACTION代码
/**
	 * 
	 * 根据仓库名加载此仓库下的原材料
	 */
	public ActionForward getYcl(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		String ckName=request.getParameter("ckName");
		List <String> yclList=ylrkTj.getYcl(form, request);
		response.setContentType("text/xml;charset=utf-8");  
		PrintWriter out = response.getWriter();
		out.print("<ycls>");
		for (String string : yclList) {
			System.out.println(string);
			out.print("<ycl>");
			out.print("<name>");
			out.print(string);
			out.print("</name>");
			out.print("</ycl>");
		}
		out.print("</ycls>");
		out.flush();
		return null;
	}
			  			        	
				        }   
	               }   
			}

[img]http://dl.iteye.com/upload/attachment/217669/2cbe449e-04c0-37a7-8670-2661ea397f02.jpg[/img]

[img]http://dl.iteye.com/upload/attachment/217671/e7003c4b-4901-3cac-ad75-3c603472f6e7.jpg[/img]