Implemented 6 & 7 (Quantified Expressions) but error when running original query in WebUI
diff --git a/asterix-app/src/main/resources/sdk/static/example/js/demo.js b/asterix-app/src/main/resources/sdk/static/example/js/demo.js
index 7298024..aafb6ae 100644
--- a/asterix-app/src/main/resources/sdk/static/example/js/demo.js
+++ b/asterix-app/src/main/resources/sdk/static/example/js/demo.js
@@ -129,7 +129,20 @@
                             alert(JSON.stringify(res));
                             $('#result6').html(res["results"]);
                           }
-        });
+        })
+        .bind( new ForClause (
+            "fbu", 
+            null, 
+            new AQLClause().set("dataset FacebookUsers")
+        ))
+        .bind( new WhereClause ( 
+            new QuantifiedExpression (
+                "some" , 
+                {"$e" : new AQLClause().set("$fbu.employment") },
+                new AQLClause().set("is-null($e.end-date)")
+            )
+        ))
+        .bind( new ReturnClause( new AQLClause().set("$fbu") ));
         alert("EXPRESSION 6 " + expression6.val());
     });
 
@@ -143,7 +156,20 @@
                             alert(JSON.stringify(res));
                             $('#result7').html(res["results"]);
                           }
-        });
+        })
+        .bind( new ForClause (
+            "fbu", 
+            null, 
+            new AQLClause().set("dataset FacebookUsers")
+        ))
+        .bind( new WhereClause ( 
+            new QuantifiedExpression (
+                "every" , 
+                {"$e" : new AQLClause().set("$fbu.employment") },
+                new AQLClause().set("not(is-null($e.end-date))")
+            )
+        ))
+        .bind(new ReturnClause( new AQLClause().set("$fbu") ));
         alert("EXPRESSION 7 " + expression7.val());
     });
 
diff --git a/asterix-app/src/main/resources/sdk/static/js/asterix-sdk-stable.js b/asterix-app/src/main/resources/sdk/static/js/asterix-sdk-stable.js
index 5867722..d24bca3 100644
--- a/asterix-app/src/main/resources/sdk/static/js/asterix-sdk-stable.js
+++ b/asterix-app/src/main/resources/sdk/static/js/asterix-sdk-stable.js
@@ -497,7 +497,7 @@
 
 
 WhereClause.prototype.bind = function(expression) {
-    if (expression instanceof BooleanExpression) {
+    if (expression instanceof AExpression) {
         this._properties["stack"].push(expression);
     }
 };
@@ -513,7 +513,7 @@
     }
     
     return value;
-}
+};
 
 
 // LimitClause
@@ -713,3 +713,8 @@
 
 QuantifiedExpression.prototype = Object.create(AExpression.prototype);
 QuantifiedExpression.prototype.constructor = QuantifiedExpression;
+
+QuantifiedExpression.prototype.val = function() {
+    var value = AExpression.prototype.val.call(this);
+    return "(" + value + ")";    
+};