// JavaScript Document
a = "odissea" 
b = "hetnet.nl" 
//c = "Onderwerp =ik wil iets kwijt"
d = "e-mail"

document.write("<a class='home' href='mailto:" + a + "@" + b + "'>"); 
// document.write("<a class='home' href='mailto:" + a + "@" + b + "?" + c + "'>"); 
document.write(d); 
document.write("</a>");