function externalLinks() 
{
    if (!document.getElementsByTagName) 
    { 
        return;
    }
    var anchors = document.getElementsByTagName("a"); 
    for (var i=0; i<anchors.length; i++) 
    {
        var anchor = anchors[i];
        if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") 
        {
            anchor.target = "_blank";
        }
    }
}

window.onload = externalLinks;



function is_filled(elm)
{
    if (elm.value == "" || elm.value == null)
    {
        return false;
    }
    else
    {
        return true;
    }
}

function is_selected(elm)
{
    if (elm.options[elm.selectedIndex].value != "empty")
    {
        return true;
    }
    else
    {
        return false;
    }
}

function is_email(elm)
{
    if (elm.value.indexOf("@") != "-1" && elm.value.indexOf(".") != "-1" && elm.value != "")
    {
        return true;
    }
    else
    {
        return false;
    }
}