Add a Jaml.automaticScope option, enabled by default, that allows J…

…aml to work in environments that don't support function decompilation.

Jaml-all.js

@@ -7,6 +7,7 @@
  */
 Jaml = function() {
   return {
+    automaticScope: true,
     templates: {},
     helpers  : {},
 
@@ -222,10 +223,20 @@ Jaml.Template.prototype = {
       data = [data];
     }
 
-    with(this) {
-      for (var i=0; i < data.length; i++) {
-        eval("(" + this.tpl.toString() + ")(data[i])");
-      };
+    if (Jaml.automaticScope) {
+      // Use function decompilation to put all helpers in the
+      // function's scope.
+      with(this) {
+        for (var i = 0; i < data.length; i++) {
+          eval("(" + this.tpl.toString() + ")(data[i])");
+        };
+      }      
+    } else {
+      // Avoid the `eval` call at the cost of slightly more verbose
+      // templates.
+      for (var i = 0; i < data.length; i++) {
+        this.tpl.call(this, data[i]);
+      }
     }
 
     var roots  = this.getRoots(),