var string1 = "oliverseddon";
var string2 = "@";
var string3 = "oliverseddon.co.uk";
var string4 = "please get in touch";
document.write("<a href=" + "mail" + "to:" + string1 + string2 + string3 + "?subject=Website" + "&nbsp;" + "Enquiry" + ">" + string4 + "</a>");