document.observe('dom:loaded', function(){
$('searchButton').observe('click', submitsearch);
$('searchpanelq').observe('keyup', function(event){
    if(event.keyCode == 13)
        submitsearch(event);
});
});

function submitsearch(e){
    var what = 'hw';
    var term = $F('searchpanelq');
    if($('pb').checked)
        what = 'pb';
    
    if (what == 'pb') {
        $('pubmedSearchTerm').value = term;
        $('pubmedSearch').submit();
    }
    else {
        $('archiveSearchTerm').value = term;
        $('archiveSearch').submit();
    }
}