Merge pull request #777 from mafl/jQuery2

Fixing #737, for jQuery > 1.6: .attr() should be .prop() for properties

Author: posabsolute

js/jquery.validationEngine.js

@@ -910,7 +910,7 @@
 				case "checkbox":
 					// new validation style to only check dependent field
 					if (condRequired) {
-						if (!field.attr('checked')) {
+						if (!field.prop('checked')) {
 							return options.allrules[rules[i]].alertTextCheckboxMultiple;
 						}
 						break;