if (document.getElementById('focus')) document.getElementById('focus').focus();

function change_check(id1,id) {
  if (document.getElementById(id1).checked == true) {
    
     document.getElementById(id).disabled=false;
	document.getElementById(id).style.display="inline";
  } else {
   
    document.getElementById(id).disabled=true; 
	document.getElementById(id).style.display="none";
  }
}

function changeDisabled(id1,id) {
  if (document.getElementById(id1).checked == true) {
    
     document.getElementById(id).disabled=false;
	
  } else {
   
    document.getElementById(id).disabled=true; 
	
  }
}

function changeVisible(id1,id) {
  if (document.getElementById(id1).checked == true) {
    
     document.getElementById(id).style.display="block"; 
  } else {
   
    document.getElementById(id).style.display="none";
  }
}