function chngProfilePage(page) {
  for(var i = 1; i <= 4; i++ ) {   
    if (i == page) {
      $("#profile-page-" + i).addClass("page-active");
      $("#profile-tab-" + i).show();
    }
    else {
      $("#profile-page-" + i).removeClass("page-active");
      $("#profile-tab-" + i).hide();
    }            
  }
  
  window.location.href = '#top';
}

function clickExpertise(id) {
  var val = $("#input-expertise-" + id).val(); 
  var newVal; 
  var visibility;
  if (val) {
    visibility = 'hidden';
    newVal = "";
  }
  else {
    visibility = 'visible';
    newVal = "1";
  }
  $("#input-expertise-" + id).val(newVal);
  $("#checkbox-expertise-" + id).css("visibility", visibility);
}

function clickCheckbox(suffix) {
  var val = $("#input-" + suffix).val(); 
  var newVal; 
  var visibility;
  if (val && val != "0") {
    visibility = 'hidden';
    newVal = "";
  }
  else {
    visibility = 'visible';
    newVal = "1";
  }
  $("#input-" + suffix).val(newVal);
  $("#checkbox-" + suffix).css("visibility", visibility);
}