/*Get permalink bvalue when it's defined*/
function getPermaLink(){
	if (null != getElementById("permalink").value){
		return getElementById("permalink").value;
	}else {
		return "";
	}
}



/*functions for twistie javascript used on the general website*/
function toggleBlockMasters(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    if (myDiv.style.display == 'none'){
      showBlockMasters(pstrID);
    } else{
      hideBlockMasters(pstrID);
    }
  }
}
function showBlockMasters(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'block';    
	var myUL = document.getElementById('u' + pstrID);
    if (myUL){		 
      myUL.className = 'collapseall';
    }
  }
}
function hideBlockMasters(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'none';
	var myUL = document.getElementById('u' + pstrID);
    if (myUL){		 
      myUL.className = 'expandall';
    }
  }
}

/*functions for twistie javascript used on the twisties with long title */
function toggleBlockTwistyLong(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    if (myDiv.style.display == 'none'){
      showBlockTwistyLong(pstrID);
    } else{
      hideBlockTwistyLong(pstrID);
    }
  }
}
function showBlockTwistyLong(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'block';    
	var myUL = document.getElementById('u' + pstrID);
    if (myUL){		 
      myUL.className = 'collapseall_long_title';
    }	
  }
}
function hideBlockTwistyLong(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'none';
	var myUL = document.getElementById('u' + pstrID);
    if (myUL){		 
      myUL.className = 'expandall_long_title';
    }	
  }
}

function showBlockMastersQS(){
  var pstrIDqs = location.search.substring(1);
  var myDiv = document.getElementById('d' + pstrIDqs);
  if (myDiv){
    myDiv.style.display = 'block';    
	var myUL = document.getElementById('u' + pstrIDqs);
    if (myUL){		 
      myUL.className = 'collapseall';
    }
  }
}

/*end function for masters*/


function toggleBlock(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    if (myDiv.style.display == 'none'){
      showBlock(pstrID);
    } else{
      hideBlock(pstrID);
    }
  }
}
function showBlock(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'block';
    var myImage = document.getElementById('i' + pstrID);
    if (myImage){
      myImage.src = 'http://www.cass.city.ac.uk/Cass/minus.gif';
      myImage.alt = 'Hide';
    }
  }
}
function hideBlock(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'none';
    var myImage = document.getElementById('i' + pstrID);
    if (myImage){
      myImage.src = 'http://www.cass.city.ac.uk/Cass/plus.gif';
      myImage.alt = 'Show';
    }
  }
}

// -Inline-
function toggleInline(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    if (myDiv.style.display == 'none') 
      showInline(pstrID);
    else 
      hideInline(pstrID);
  }
}
function showInline(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.display = 'inline';
  }
}
function hideInline(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv) {
    myDiv.style.display = 'none';
  }
}

// -Popup-
function togglePopup(pstrID, pstrHID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    if (myDiv.style.display == 'none'){
      showPopup(pstrID, pstrHID);
    } else{
      hidePopup(pstrID);
    }
  }
}
function showPopup(pstrID, pstrHID){
  var myDiv = document.getElementById('d' + pstrID);
  var myAnchor = document.getElementById(pstrHID);
  if (myDiv && myAnchor){
    myDiv.style.visibility = 'visible';
    myDiv.style.display = '';

    // Calculate x and y position
    var intX = getElementLeft(myAnchor);
    var intY = getElementTop(myAnchor) + myAnchor.offsetHeight;
    var extraX = (intX + myDiv.offsetWidth) - document.body.offsetWidth;
    var extraY = (intY + myDiv.offsetHeight) - document.body.offsetHeight;
    if (extraX > 0) { intX -= extraX; }
    if (extraY > 0) { intY -= myDiv.offsetHeight + (myAnchor.offsetHeight * 1.5); }
    if (intX < 0) { intX = 0; }
    if (intY < 0) { intY = 0; }

    // Set x and y position
    myDiv.style.left = intX + "px";
    myDiv.style.top = intY + "px";
  }
}
function hidePopup(pstrID){
  var myDiv = document.getElementById('d' + pstrID);
  if (myDiv){
    myDiv.style.visibility = 'hidden';
    myDiv.style.display = 'none';
  }
}


// -ShowAll-
function toggleAll(pstrClass, pblnUpdate){
  var aLinks = document.links;
  var myAnchor;
  var myImage;

  for (var i=0; i < aLinks.length; i++) {
    if (aLinks[i].href.indexOf('toggleAll(\''+pstrClass) > -1) {
      myAnchor = aLinks[i];
      if (myAnchor.innerHTML == 'Show All') {
        showAll(pstrClass);
        if (pblnUpdate){
          myAnchor.innerHTML = 'Hide All';
          myAnchor.title = 'Hide All';
          myImage = myAnchor.previousSibling;
          if (myImage.nodeName == 'IMG'){
            myImage.src = 'http://www.cass.city.ac.uk/Cass/minus.gif';
            myImage.alt = 'Hide';
          }
        }
      } else{
        hideAll(pstrClass);
        if (pblnUpdate){
          myAnchor.innerHTML = 'Show All';
          myAnchor.title = 'Show All';
          myImage = myAnchor.previousSibling;
          if (myImage.nodeName == 'IMG'){
            myImage.src = 'http://www.cass.city.ac.uk/Cass/plus.gif';
            myImage.alt = 'Show';
          }
        }
      }
    }
  }

}
function showAll(pstrClass) {
  var aElts = document.getElementsByTagName('div');
  setDisplay(pstrClass, aElts, 'show', 'Block');
  aElts = document.getElementsByTagName('span');
  setDisplay(pstrClass, aElts, 'show', 'Inline');
}
function hideAll(pstrClass) {
  var aElts = document.getElementsByTagName('div');
  setDisplay(pstrClass, aElts, 'hide', 'Block');
  aElts = document.getElementsByTagName('span');
  setDisplay(pstrClass, aElts, 'hide', 'Inline');
}
function setDisplay(pstrClass, paElts, pstrDisplay, pstrType){
  for (var i=0; i < paElts.length; i++) {
    if (paElts[i].className == pstrClass) {
      eval(pstrDisplay + pstrType + '("' + paElts[i].id.slice(1) + '")')
    }
  }
}

// -Fns to determine absolute position of an element-
function getElementLeft(pElt){
  var intX = pElt.offsetLeft;
  while ((pElt = pElt.offsetParent) != null){
    intX += pElt.offsetLeft; 
  }
  return intX;
}
function getElementTop(pElt){
  var intY = pElt.offsetTop;
  while((pElt = pElt.offsetParent) != null){
    intY += pElt.offsetTop;
  }
  return intY;
}