function rsTextSelection() {
    if (document.getSelection) // older Mozilla versions
    {
        var selectedString = document.getSelection();
    }
    else if (document.all) // MSIE 4+
    {
        var selectedString = document.selection.createRange().text;
    }
    else if (window.getSelection) // recent Mozilla versions
    {
        var selectedString = window.getSelection();
    }
    document.rs_form.selectedtext.value = selectedString;
    if (document.rs_form.url) {
        if (!document.rs_form.url.value) {
            if (window.location.href) {
                document.rs_form.url.value = window.location.href;
            }
            else if (document.location.href) {
                document.rs_form.url.value = document.location.href;
            }
        }
    }
}

function copyselected() {
    setTimeout("rsTextSelection()", 50);
    return true;
}

function openAndRead() {
    window.open('', 'rs', 'width=310,height=120,toolbar=0');
    setTimeout("document.rs_form.submit();", 500);
}

document.onmouseup = copyselected;
document.onkeyup = copyselected;