GInfoWindowOptions does not have a constructor, so you cannot create actual GInfoWindowOptions objects, but you can create objects which are indistinguishable from them. You use a GInfoWindowOptions object by creating an object literal with the appropriate properties. See this page for the properties you can use http://www.google.com/apis/maps/documentation/reference.html#GInfoWindowOptions When you open an info window, e.g. er.openInfoWindowHtml("Some <b>text</b> to show", {maxWidth:400}); The object literal "{maxWdith:400}" is used as a GInfoWindowOptions object. It not necessary to have an actual GInfoWindowOptions object because of duck typing, which says, if it walks like a duck, and talks like a duck, it's a duck. The object literal behaves identically to a GInfoWindowOptions object, so it is indistinguishable from the real thing. 我E文不是很好，怕误导你，就不帮你翻译了。 希望这些资料能帮上你的忙。
When you open an info window, e.g. er.openInfoWindowHtml("Some <b>text</b> to show", {maxWidth:400}); The object literal "{maxWdith:400}" is used as a GInfoWindowOptions object. It not necessary to have an actual GInfoWindowOptions object because of duck typing, which says, if it walks like a duck, and talks like a duck, it's a duck. The object literal behaves identically to a GInfoWindowOptions object, so it is indistinguishable from the real thing. 我E文不是很好，怕误导你，就不帮你翻译了。
希望这些资料能帮上你的忙。