<input type="hidden" id="getValue" name="getValue" value="" />

//彈出子窗口（選擇商家）
 function choseMerchant() {

  //獲取當(dāng)前窗口名稱
  var parentName= window.name;

  /*（由于用的ssm框架）URL對(duì)應(yīng)的是controller方法，并向其傳遞當(dāng)前窗口名稱，打開(kāi)的窗口顯示頁(yè)面即    
  為經(jīng)過(guò)controller方法后返回的頁(yè)面*/
  var url = root + "/adPosition/choseMerchant?parentName="+ parentName;

  laySum = parent.layer.open({
   //設(shè)置打開(kāi)的子窗口效果
   type : 2,
   title : "選擇商家",
   shadeClose : true,
   shade : 0.5,
   shift : 0,
   area : [ '40%', '863px' ],
   content : url,
   success: function(layero, index){ 
   }
  });
 }

<input type="hidden" id="mainIframeName" name="mainIframeName" value="${parentName}">

function setvalue() {

  //得到“mainIframeName”輸入框中存儲(chǔ)的值
  var mainIframeName = $("#mainIframeName").val();

  //判斷是否為空或者是未定義
  if (mainIframeName != "" && mainIframeName != "undefined") 
  {
  //此處的ifrc和winc的意義可自行查閱
  var ifrc = window.parent.frames[mainIframeName];
  var winc = ifrc.window || ifrc.contentWindow;
  try {
   //設(shè)置父窗口隱藏輸入框的值為hello world
   winc.document.getElementById("getValue").value = "hello world!";
   } catch (ex) {
    winc.location.reload();
   }
  }
   //關(guān)閉當(dāng)前窗口
   var index = parent.layer.getFrameIndex(window.name);
   parent.layer.close(index);
 }