Button: Ignore non-radio elements with the same name

Fixes #8761
Closes gh-1185

Author: tjvantoll

tests/unit/button/button_core.js

@@ -53,6 +53,20 @@ test("radio groups", function() {
 	assert(":eq(1)", ":eq(0)", ":eq(0)");
 });
 
+test( "radio groups - ignore elements with same name", function() {
+	expect( 1 );
+	var form = $( "form:first" ),
+		radios = form.find( "[type=radio]" ).button(),
+		checkbox = $( "<input>", {
+			type: "checkbox",
+			name: radios.attr( "name" )
+		});
+
+	form.append( checkbox );
+	radios.button( "refresh" );
+	ok( true, "no exception from accessing button instance of checkbox" );
+});
+
 test("input type submit, don't create child elements", function() {
 	expect( 2 );
 	var input = $("#submit");

ui/button.js

@@ -40,9 +40,9 @@ var lastActive,
 		if ( name ) {
 			name = name.replace( /'/g, "\\'" );
 			if ( form ) {
-				radios = $( form ).find( "[name='" + name + "']" );
+				radios = $( form ).find( "[name='" + name + "'][type=radio]" );
 			} else {
-				radios = $( "[name='" + name + "']", radio.ownerDocument )
+				radios = $( "[name='" + name + "'][type=radio]", radio.ownerDocument )
 					.filter(function() {
 						return !this.form;
 					});