Код AS1/AS2:
subject = "You Win 10y.e.!!!";
BeginBody = "Hi Denis! My name is BoBa";
Body = "Body email";
EndBody = "My E-Mail BoBaZiLvova(at)rus.net";
getURL("mailto:_zeus@mail.ru?subject="+subject+"&body=" + BeginBody +'<BR>'+ Body +'<BR>'+ EndBody, "_self");
помоему так достаточно