// JavaScript Document
function showonlyone(thechosenone) {
      var newboxes = document.getElementsByTagName("div");
            for(var x=0; x<newboxes.length; x++) {
                  name = newboxes[x].getAttribute("name");
                  if (name == 'newboxes') {
                        if (newboxes[x].id == thechosenone) {
                        newboxes[x].style.display = 'block';
                  }
                  else {
                        newboxes[x].style.display = 'none';
                  }
            }
      }
      
      for(var i=1;i<4;i++){
        
        var isSelected = ('newboxes' + i) == thechosenone;
        
        var img = $('#Image' + i)[0]; 
        
        var isOn = img.src.indexOf('_f2') > -1;
        
        var src = isOn ? img.src.substr(0, img.src.length - 7) : img.src.substr(0, img.src.length - 4) ;
        
        if (isSelected){
            src += '_f2';  
            $('#Image' + i).addClass('imgon');   
        } else {
            $('#Image' + i).removeClass('imgon');      
        }
        
        src += '.jpg';
        img.src = src;
      }
   
}