function toggle_vdict() {
target_vdict = document.getElementById('vdict');
target_seeviet = document.getElementById('seeviet');
target_xoops = document.getElementById('xoops');
if (target_vdict.style.display == "none"){
target_vdict.style.display="block";
target_seeviet.style.display="none";
target_xoops.style.display="none";
}
}

function toggle_xoops() {
target_xoops = document.getElementById('xoops');
target_seeviet = document.getElementById('seeviet');
target_vdict = document.getElementById('vdict');
if (target_xoops.style.display == "none"){
target_xoops.style.display="block";
target_seeviet.style.display="none";
target_vdict.style.display="none";
}
}

function toggle_seeviet() {
target_xoops = document.getElementById('xoops');
target_seeviet = document.getElementById('seeviet');
target_vdict = document.getElementById('vdict');
if (target_seeviet.style.display == "none"){
target_xoops.style.display="none";
target_seeviet.style.display="block";
target_vdict.style.display="none";
}
}