var fieldtype_selected = 0;

function showHide(elementId) {

if(document.getElementById('virtual_checkbox_' + elementId).className == 'virtual_checkbox') {
document.getElementById('virtual_checkbox_' + elementId).className = 'virtual_checkbox_opened';
document.getElementById('virtual_selectbox_' + elementId).className = 'virtual_selectbox_opened'
}
else {
document.getElementById('virtual_checkbox_' + elementId).className = 'virtual_checkbox';
document.getElementById('virtual_selectbox_' + elementId).className = 'virtual_selectbox';
}

}