function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

function AjaxGet(url) {
  var req = false;
  // For Safari, Firefox, and other non-MS browsers
  if (window.XMLHttpRequest) {
    try {
      req = new XMLHttpRequest();
    } catch (e) {
      req = false;
    }
  } else if (window.ActiveXObject) {
    // For Internet Explorer on Windows
    try {
      req = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
      try {
        req = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {
        req = false;
      }
    }
  }
 
  if (req) {
    // Synchronous request, wait till we have it all
    req.open('GET', url, false);
    req.send(null);
  } 
  else {
    return;
  }
}

function BookMark(SkyProgrammeId){
    var _Url = "AddBookMark.aspx?skyprogrammeid=" + SkyProgrammeId;
    AjaxGet(_Url);
    alert("added to bookmark");
}

function changeFontSize(inc){  
    var p = document.getElementsByTagName('body');  
    for(n=0; n<p.length; n++) {    
        if(p[n].style.fontSize) {      
             var size = parseInt(p[n].style.fontSize.replace("%", ""));    
        } 
        else {       
             var size = 62.5;    
        }    
    p[n].style.fontSize = size+inc + '%';   
    }
}

function resetFontSize(){  
    var p = document.getElementsByTagName('body'); 
    for(n=0; n<p.length; n++) {    
  
         var size = 62.5;   
    p[n].style.fontSize = size + '%';   
    }
}

function LoadBanner(){ 
    var ImageArr = new Array("SL_Banner_DiscoAP01.jpg",
                            "SL_Banner_DiscoSci02.jpg",
                            "SL_Banner_DiscoSci.jpg",
                            "SL_Banner_Discov02.jpg",
                            "SL_Banner_History01.jpg",
                            "SL_Banner_History02.jpg");
    var i = ImageArr.length;
    var RndNo = Math.round((i-1)*Math.random());
    var _tempImg = "images/banners/" + ImageArr[RndNo];
    document.getElementById('Header').style.backgroundImage="url('"+ _tempImg + "')";
}