var string1 = "info";
var string2 = "@";
var string3 = "equinox-design.com";
var string4 = string1 + string2 + string3;
var string5 = "?subject=Enquiry";
document.write("<a href=" + "mail" + "to:" + string1 + string2 + string3 + string5 +">" + string4 + "</a>");