Dialog: Verify that we get a string back from .attr( "title" ) before using the return value. Fixes #5742 - Form field with name="title" moved to title area.

Author: scottgonzalez

tests/unit/dialog/dialog.html

@@ -19,6 +19,7 @@
 	<link rel="stylesheet" href="../../../external/qunit.css" type="text/css"/>
 	<script type="text/javascript" src="../../../external/qunit.js"></script>
 	<script type="text/javascript" src="../../jquery.simulate.js"></script>
+	<script type="text/javascript" src="../testsuite.js"></script>
 
 	<script type="text/javascript" src="dialog_core.js"></script>
 	<script type="text/javascript" src="dialog_defaults.js"></script>

ui/jquery.ui.dialog.js

@@ -49,6 +49,10 @@ $.widget("ui.dialog", {
 	},
 	_create: function() {
 		this.originalTitle = this.element.attr('title');
+		// #5742 - .attr() might return a DOMElement
+		if ( typeof this.originalTitle !== "string" ) {
+			this.originalTitle = "";
+		}
 
 		var self = this,
 			options = self.options,