function confirmLink(question, url)
{
    var is_confirmed = confirm(question);

    if (is_confirmed)
        window.location = url;

    return is_confirmed;
}

function showhide_field(name, show)
{
    if (document.getElementById(name).style.display == "none"  &&  show == ''  ||  show == 1)
    {
        document.getElementById(name).style.display = "block";
    }
    else
    {
        document.getElementById(name).style.display = "none";
    }
}

function showhide_img_field(name, show)
{
    if (document.getElementById(name).style.display == "none"  &&  show == ''  ||  show == 1)
    {
        document.getElementById(name).style.display = "block";
    }
    else
    {
        document.getElementById(name).style.display = "none";
    }
}
selectedObj = '';
function switch_tab(objID)
{
    var obj = document.getElementById(objID);

    if (selectedObj != obj)
    {
        obj.style.display = '';
        selectedObj.style.display = 'none';
        selectedObj = obj;
    }
}

function $(element)
{
    if ( arguments.length > 1 )
    {
        var elements = [];

        for ( var i = 0,  length = arguments.length;  i < length;  i++ )
        {
            elements.push($(arguments[i]));
        }

        return elements;
    }

    if ( typeof(element) == 'string' )
    {
        element = document.getElementById(element);
    }

    return element;
};