function showbox(option,name) {
// 0 for hide
// 1 for show
        switch(option) {
                case "0":
                        document.getElementById(name).style.display = "none";
                        break;
		            case "1":	
                        document.getElementById(name).style.display = "block";
                        break;
                default:
				if (document.getElementById(name).style.display == "block") {
	                        document.getElementById(name).style.display = "none";							
				} else {
	                        document.getElementById(name).style.display = "block";							
				}
        }
}

function showbox2() {
  var x = document.getElementById('msgOpt');
  var y = document.getElementById('checkCP');
  var z = document.getElementById('checkCPlabel');
  if(x.selectedIndex == 1){
   showbox('0','pp'); 
   showbox('1','cp');
   y.checked = true;
   z.style.display = 'none';      
  }
  else
  if(x.selectedIndex == 2){
   z.style.display = 'block';  
   showbox('1','pp');      
  }
  else{
   showbox('0','pp');   
   z.style.display = 'block'            
  }
  

}