function getInnerText(spanTag) {
    var text="";
    try
    {
        //IE
        if(document.all) 
        {
            text=spanTag.innerText;
        }
        else //Firefox
        {    
            text=spanTag.innerHTML;
        }
    }
    catch(e){}
    return text;
}
function setinnerText(spanTag, text) {
  //IE
  if(document.all) {
    spanTag.innerText=text;
  }
  else {    
  //Firefox
    if(text=='') {
      //FF won't reserve space for empty text
      spanTag.innerHTML=' ';
    }
    else {
      spanTag.innerHTML=text;
    }
  }   
}