var anchortext = "ici";
var mailpart1 = "web84.corp";
var mailpart2 = "gmail.com?subject=Demande_de_Partenariat_pour_RESTAURANT_LES_ARTS_AVIGNON";
document.write("<a href=" + "mail" + "to:" + mailpart1 +
"@" + mailpart2 + ">" + anchortext + "</a>")