var opened = false;

function changeVisibility(element)
{
    emt = document.getElementById(element);
    if(emt) {
        if(opened)  {
            emt.className = "dn";
            opened = false;
        }
        else {
            emt.className = "db";
            opened = true;
        }
    }
}


function selectable()
{
    var textable = document.getElementById("textable");
    var table    = document.getElementById("exportable");
    if(textable && table) {
        textable.value = table.innerHTML;
        textable.select();
    }
    document.execCommand('Copy');
}