b=108625 Fix regression / XUL value attribute assignment

r=ddrinan sr=blizzard

security/manager/pki/resources/content/certpicker.js

@@ -73,7 +73,7 @@ function setDetails()
 {
   var index = parseInt(document.getElementById("nicknames").value);
   details = dialogParams.GetString(index+itemCount+3);
-  document.getElementById("details").setAttribute("value", details);
+  document.getElementById("details").value = details;
 }
 
 function onCertSelected()