var first = 'ma';
var second = 'il';
var third = 'to:';
var address = 'RandallScott';
var domain = 'Ghostryders';
var ext = 'com'; 
document.write('<a href="');
document.write(first+second+third);
document.write(address);
document.write('@');
document.write(domain);
document.write('.');
document.write(ext); 
document.write('">'); 
document.write('&nbsp;&nbsp;&nbspContact Randall Scott&nbsp;&nbsp;&nbsp</a>');