var email1 = "mjblayney";
var email2 = "gmail.com";   
var mt="mailto:";
var smb="@";

var imag="images/letter.gif";  
document.write('<a href=' + mt+ email1 + smb+ email2 +'>'+ '<IMG SRC='+imag+ ' border=0 width=32 height=18></a><BR><font color="#000000" size="1">'+email1+smb+email2+'<BR>')