// JavaScript Document
function openclose(){
    if (document.getElementById('dvName').style.display=='none'){
     document.getElementById('dvName').style.display='';
     document.getElementById('spOpen').innerHTML = 'Close';

  }else{
    document.getElementById('dvName').style.display='none';
    document.getElementById('spOpen').innerHTML = 'Open';
  }

}


<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->