var browserType;
if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {browserType= "gecko"}
function GetLayer(idname) {
    if (browserType == "gecko" ) {
      document.poppedLayer = eval('document.getElementById(\''+idname+'\')');
    } else if (browserType == "ie") {
      document.poppedLayer = eval('document.all[\''+idname+'\']');
    } else {
      document.poppedLayer = eval('document.layers[\'`'+idname+'\']');
    }
  return document.poppedLayer; 
}



function RollUpHeader() {
  var o =  GetLayer("cbody");
  var divY          = o.offsetHeight;
  
  new Effect.MoveBy(o, -55, 0, {duration:1.5});
}

function ChangePage(pageName) {
  ProcessPageChange(pageName);
  if (pageName == 'home') {
    if (GetLayer("headerStatus").value == 0) {
      RollDownHeader();
      GetLayer("headerStatus").value = 1;
    }
  } else {
    if (GetLayer("headerStatus").value == 1) {
      RollUpHeader();
      GetLayer("headerStatus").value = 0;
    }
  }
}




function ProcessPageChange(pageName) {
    new Ajax.Updater('PageBody',
      'page.php?name='+encodeURIComponent(pageName),{
        onLoading:function(request) {
        },
        onComplete:function(request) {
        },
        method:'get',
        asynchronous:'true',
        evalScripts:'true'

      }
    );

}