selectAll.click(function (){
if(this.value == 'select'){
this.value = 'deselect';
this.checked = false;
deselectAllLabel.show();
selectAllLabel.hide();
langs.prop('checked', true);
}
else {
this.value = 'select';
this.checked = false;
selectAllLabel.show();
deselectAllLabel.hide();
langs.prop('checked', false);
}
});

invertSelect.click(function (){
for(var i=0;i<langs.length;i++){
langs[i].checked = !langs[i].checked;
}
});