coded = "NHO2 djO7 0OAjO7MOHO2AjO7.ren4"
key = "BdiWRu@AD0X3V>StGUhjwOP1rHI52LY7TgbEMNvF9Km4<ZCzxc6skpeJafyolQqn8"
shift=coded.length
plain=""
for (i=0; i<coded.length; i++){
    if (key.indexOf(coded.charAt(i))==-1){
        ltr=coded.charAt(i)
        plain+=(ltr)
    } else {
        ltr = (key.indexOf(coded.charAt(i))-shift+key.length) % key.length
        plain+=(key.charAt(ltr))
    }
}
document.write("<a href='mailto:"+plain+"'>email me</a>")