function showHide(id,action){
    var v = document.getElementById(id);
    if (action == 'show'){
        // v.style.display = 'block'
        v.style.visibility = 'visible'
    }else if (action == 'hide'){
        // v.style.display = 'none'
        v.style.visibility = 'hidden'
    }
    return true;
}
function showHideMenu(menuID,action){
    
    hideMenus();
    
    if (action == 'hide') {
        return true;
    }else if (action == 'show') {
        showHide(menuID,'show');
    }
}
function hideMenus() {
    showHide('menu1','hide');
    showHide('menu2','hide');
    showHide('menu3','hide');
    showHide('menu4','hide');
}
 
// Annual report frontpage, image gallery
function writeImage(){
    var picFrame = document.getElementById('pictureFrame');
    var imgNumber = document.getElementById('numberOfImg');
    if (picFrame){
        picFrame.innerHTML = "<img src='"+pics[thenum]+"' width='261' name='img1' />\n"
    }
   
    if (imgNumber){
        imgNumber.innerHTML = thenum+1 + "/" + numpics;
    }
}
function nextImg()
 {
         var x=0;
         thenum+=1;
         if (thenum>numpics-1)
         { 
           document[imgName].src=pics[0];
           thenum=0;
           }
         else
         {
           document[imgName].src=pics[thenum];
           x+=1;
          }
          writeImage();
 }
 
 function prevImg()
 {
         var x=0;
         thenum-=1;
         if (thenum<0)
         { 
           document[imgName].src=pics[pics.length-1];
           thenum=pics.length-1;
           }
         else
         {
           document[imgName].src=pics[thenum];
           x-=1;
          }
          writeImage();
 }