iframe怎么用

Question

给个 例子
function SetParentValue() {
            var obj = objRadio;// $get("SuppliersGroup");
            if ((obj==null) || (obj==undefined)) {
                alert("请先选择一条企业信息");
            }
            else{
                if (obj.checked==false) {
                    alert("请先选择一条企业信息");
                }
                else {
                    var ss = obj.value.split(":");
                    var companyName = document.getElementById("hfCompanyName").value;
                    var companyId = document.getElementById("hfCompanyId").value;
                    var floorCount=getQueryStringRegExp("floor");
                    switch(floorCount)
                    {
                        case "1":
                            if (companyId!="") {
                                D.document.getElementById(companyId).value =ss[1];
                            }
                            
                            D.document.getElementById(companyName).value =ss[0];
                            
                            //var T = window.parent.A().topw;
                            //alert();
                        //  T.document.getElementsByTagName("iframe")[0].contentWindow.document.getElementById("xbtn").onclick();
                            //D.contentWindow.document.getElementById("xbtn").click();
                            break;
                        case "2":
                            var T = window.parent.A().topw;
                            var iTopFrameCount = T.document.getElementsByTagName("iframe").length;
                            for(var i=0;i<iTopFrameCount;i++)
                            {
                                if (T.document.getElementsByTagName("iframe")[i].contentWindow.document.getElementsByTagName("iframe").length==1) {
                                    var objFrame = T.document.getElementsByTagName("iframe")[i].contentWindow.document.getElementsByTagName("iframe")[0];
                                    if (objFrame.src.indexOf(getQueryStringRegExp("refname"))!=-1) {
                                        objFrame.contentWindow.document.getElementById(companyName).value=ss[0];
                                        if (companyId!="") {
                                            objFrame.contentWindow.document.getElementById(companyId).value=ss[1];
                                        }
                                        break;
                                    }
                                }
                            }
                            break;
                    }                    //alert(P);
                    PageClose();
                }
            }
        }