function outputEImg(ex,d,usr,sub) {
    var t = '.';
    var n = '?';
    var e = usr + '@' + d + t + ex;
    var s1 = n + 'sub';
    var s2 = 'ject=' + sub;
    var l1 = 'ma';
    var l2 = 'ilto:' + e;
    var l3 = s1 + s2;
    var start = '<a href="';
    var end = '">';
    document.writeln(start+l1+l2+l3+end);
}