a_u="ironbike"
a_d="ironbike.es"
b_u="guillendelvalle"
b_d="gmail.com"
c="@"

function gm(){
   return a_u + c + a_d
}

function wgm(){
   document.write("<a href='mailto:" + gm() + "'>" + gm() + "</a>")
}
function gm2(){
   return b_u + c + b_d
}

function wgm2(){
   document.write("<a href='mailto:" + gm2() + "'>" + gm2() + "</a>")
}