var mailp3='com';
var mailp2='gmail.';
var mailp1='mu3a.memsec';
var anchortxt='Membership Secretary';
var mailp4='?subject=Membership_Enquiry_to_MU3A';

var writeExternalContent ='';

     writeExternalContent += '<a href='+'mail' + 'to:' + mailp1 + '@' + mailp2 + mailp3 + mailp4 + '>' + anchortxt+ '</a>';

/*   writeExternalContent += '<a href='+'mail' + 'to:' + mailp1 + '@'+ mailp2 + mailp3 + mailp4 + '>' + anchortxt + '</a>';  */

document.writeln(writeExternalContent);