function change_color(color){
    var dbar;
    dbar=document.getElementById('bar');
    dbar.style.backgroundColor=color;
    
    
    /*element = document.getElementById(id); 
    event.cancelBubble = true; 
    oldcolor = element.currentStyle.background; 
    element.style.background = color;*/

}
function change_ricetta(id){
    document.getElementById('div1').style.display='none';
    document.getElementById('div2').style.display='none';
    document.getElementById('div3').style.display='none';
    document.getElementById('div4').style.display='none';
    var dd=document.getElementById(id);
    dd.style.display='block';
    
}
function print_page(){
    
    var query = window.location.search.substring(1);
      var vars = query.split("&");
      for (var i=0;i<vars.length;i++) {
        var pair = vars[i].split("=");
        //alert(pair[0] + ' - ' + pair[1]);
        if (pair[0] == 'id') {
          document.getElementById(pair[1]).style.display='block';
          window.print();
        }        
      } 
    

}