เกี่ยวกับ การ search ด้วย ajax น่ะครับ แบบว่า ไม่รู้ว่า เราทำ textbox และ รุบุยังไง จึงจะได้ครับ

function getItems() {
    // only if req shows "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
		document.getElementById('fe_items').innerHTML="";
        var response = req.responseXML;
		//Get the xml root
		var root = response.getElementsByTagName("items")[0];
		var items = root.getElementsByTagName("item");
		for(i=0;i<items.length;i++){
		  var iidp = items[i].getElementsByTagName("idp")[0].firstChild.nodeValue;
		  var ititle = items[i].getElementsByTagName("title")[0].firstChild.nodeValue;
		  var iprice = items[i].getElementsByTagName("price")[0].firstChild.nodeValue;
		  var ipicture = items[i].getElementsByTagName("picture")[0].firstChild.nodeValue;
		  var iservices = items[i].getElementsByTagName("services")[0].firstChild.nodeValue;
		  var icounter = items[i].getElementsByTagName("counter")[0].firstChild.nodeValue;
		  var iincome = items[i].getElementsByTagName("income")[0].firstChild.nodeValue;
		  var item = document.createElement("table");
		  item.className = "tabitem";
		  item.onclick = new Function("addItem(\""+iidp+"\",\""+ititle+"\",\""+iprice+"\",\""+ipicture+"\",\""+iservices+"\",\""+icounter+"\",\""+iincome+"\");");
		  var tbitem = document.createElement("tbody");
		  item.appendChild(tbitem);
		  var row1 = document.createElement("tr");
		  var row2 = document.createElement("tr");
		  tbitem.appendChild(row1);
		  tbitem.appendChild(row2);
		  var cell1 = document.createElement("td");
		  var cell2 = document.createElement("td");
		  row1.appendChild(cell1);
		  row2.appendChild(cell2);
		  im1 = document.createElement("img");
		  im1.setAttribute("src",ipicture);
		  cell1.appendChild(im1);
		  cell2.innerHTML = ititle;
		  document.getElementById('fe_items').appendChild(item);
		}
		
        } else {
            alert("There was a problem retrieving the XML data:\n" + req.statusText);
        }
    }
}