function showHide(elementID){
var element = document.getElementById(elementID)
if (element.style.display == "block") element.style.display = "none"
else element.style.display = "block"
}
function hideShow(elementID){
var element = document.getElementById(elementID)
if (element.style.display != "none") element.style.display = "none"
else element.style.display = "block"
}
function swapBriefFull(elementName){
   var full_element = document.getElementById(elementName + "_full");
   var img_element = document.getElementById(elementName + "_img");
   hideShow(elementName + "_brief");
   showHide(elementName + "_full");
   if (full_element.style.display == "none")
      img_element.title = "Click to read more"
   else
      img_element.title = "Click to hide"
   
}

function expandCollapse(elementName) {
   var full_element = document.getElementById(elementName + "_full");
   var img_element = document.getElementById(elementName + "_img");
   showHide(elementName + "_full");
   if (full_element.style.display == "none")
      img_element.alt = "Click to read more"
   else
      img_element.alt = "Click to hide"
   
}

function zoomBook(BookID) {
   var hfBookID = document.getElementById("hfBookID");
   hfBookID.value = BookID;
   __doPostBack('lbHidden','');
}