How to get textbox entered value and with related row value in textarea using xml file in javascript

Hi Friends,

I have a smal task i.e

I have textbox1 ,botton,textbox2 when i enter 21 value then i click button its get in sama row values in textbox2.

I have xml file like this

 
 
  101
  R-12
  4.266
  White
 
 
  20
  R-22
  4.266
  Green
 
 
  21
  R-32
  4.266
  White
 
 
  104
  R-134A
  4.246
  Light Blue
 
 
  21
  R-290
  4.246
  White
 
 
  31
  R-401A
  4.246
  Pink
 
 
  32
  R-401B
  4.264
  White
 
 
  108
  R-402A
  4.426
  Light Greem
 
 
  129
  R-402B
  4.266
  White
 
 
  110
  R-404A
  4.246
  Orange
 
 
  121
  R-407A
  4.267
  White
 
 
  122
  R-408A
  4.267
  White
 
 
  113
  R-409A
  4.267
  White
 
 
  134
  R-407C
  4.264
  White
 
 
  115
  R-410A
  4.426
  White
 
 
 then i try this hear i get all values
function gettxt() {
 
  results = new Array;
  var searchterm = document.getElementById("searchme").value;
  if (searchterm == null || searchterm == "") {
  alert("Enter textbox value");
  return false;
  }
  var istrlen1 = searchterm.length;
  var tempname1;
  if (istrlen1 == 1) {
  tempname1 = searchterm;
  }
  if (istrlen1 == 2) {
  tempname1 = searchterm;
  }
  if (istrlen1 == 3) {
  tempname1 = searchterm;
  }
  if (istrlen1 == 4) {
  tempname1 = searchterm;
  }
  for (i = 0; i < x.length; i++) {
  var name = x[i].getElementsByTagName("R_ID")[0].firstChild.nodeValue;
  var name1 = x[i].getElementsByTagName("R_NAME")[0].firstChild.nodeValue;
  var exp = new RegExp(tempname1, "i");
  if (name.match(exp) != null) {
  y = y + 1;
  results.push(name1);
  }
  }
  textbox2.value = results;   
  }

I try the above code hear small problom when i enter 21 and click button its display 21,121,123... related values i dont want like that

For example textbox1=21 buttonclick textbox2=R-32,r-407A,r-408A like that i dont want like that

I want textbox1=21 buttonclick textbox2=R-32 only in same row value
please any one knows well in js please resolve my problom