function WriteWebBy()
{
 var uname = 'tro';
 var isp1 = 'ada';
 var isp2 = 'm.com';
 var em = uname+'yd@'+isp1+isp2+'.au';
 
  document.write('Web site design<br>by<br><a href="mailto:'+em+'?subject=Enquiry from Seaton Calisthenics website">'+em+'</a>');
}

WriteWebBy();