Segment expandable view single row only open at the time sample

var gblHfd ="";
function onrowclickofseg(){
  var cisshow;
  var selectedIndex= frmQA.Seg.selectedRowIndex[1];
  if(frmQA.Seg.selectedRowItems[0].flxQA2.isVisible === true){
    cisshow = false;
    //gblHfd = "";
  }else{
    cisshow = true;
    //gblHfd = selectedIndex;
  }
  if(gblHfd !== ""){
    var obj1 = {"flxQA1":{isVisible:true},"lblQ":{isVisible:true,text:"Explain the difference between a class and an object",skin:"sknlbltmp"},"flxQA2":{isVisible:false},"flxA":{isVisible:true},"lblA":{isVisible:true,text:"Is answer",skin:"sknlbltmpans"},"imgArrow":{isVisible:true,src:"forward.png"}};
    frmQA.Seg.setDataAt(obj1,gblHfd,0); 
    var obj2 = {"flxQA1":{isVisible:true},"lblQ":{isVisible:true,text:"Explain the difference between a class and an object",skin:"sknlbltmp"},"flxQA2":{isVisible:cisshow},"flxA":{isVisible:true},"lblA":{isVisible:true,text:"Is answer",skin:"sknlbltmpans"},"imgArrow":{isVisible:true,src:"forward.png"}};
    frmQA.Seg.setDataAt(obj2,selectedIndex,0);
  }else{
    var obj = {"flxQA1":{isVisible:true},"lblQ":{isVisible:true,text:"Explain the difference between a class and an object",skin:"sknlbltmp"},"flxQA2":{isVisible:cisshow},"flxA":{isVisible:true},"lblA":{isVisible:true,text:"Is answer",skin:"sknlbltmpans"},"imgArrow":{isVisible:true,src:"forward.png"}};
    frmQA.Seg.setDataAt(obj,selectedIndex,0);
  }
  if(cisshow === true){
    gblHfd = selectedIndex;
  }else{
    gblHfd = "";
  }
}