// My Research Reading Log Javascript

// Popup Window Variable
var popUpWin=0;

function toggleLayer( whichLayer )
{
  var elem, vis;
  if( document.getElementById ) // this is the way the standards work
    elem = document.getElementById( whichLayer );
  else if( document.all ) // this is the way old msie versions work
      elem = document.all[whichLayer];
  else if( document.layers ) // this is the way nn4 works
    elem = document.layers[whichLayer];
  vis = elem.style;
  // if the style.display value is blank we try to figure it out here
  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
  vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

// Open Popup Windows (TODO Replace with Ajax effect)
function openpopup(popurl)
{
  if (popUpWin) {
    if (!popUpWin.closed) popUpWin.close();
  }
  popUpWin = open(popurl,'ResearchLogPopup','width=450,height=150,toolbar=no,status=no,resizable=yes,screenX=' + (screen.height-100)/2 + ',top=' + (screen.height-100)/2 + ',screenY=' + ((screen.width-350)/2) + ',left=' +((screen.width-350)/2)+'');
}