When I debug an ASP.NET web forms application it opens with IE 7 document standards and also gives me Jquery error.
This occurs because localhost site is added Compatibility View in IE and because of that it by default opens all debug forms in IE 7 Mode. To resolve this problem please follow below steps
1. Open IE
2. Press Alt and click Tools from IE menu bar
3. Select Compatibility View Settings
4. Remove localhost from Websites you added to Compatibility View