$(document).ready(function(){
    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";
    }
});

function helpwindow(helpurl){
    window.open(helpurl,"","width=640,height=110,scrollbars")
}