tailieunhanh - JavaScript Programmer's Reference phần 10

Các vị trí thẳng đứng của đối tượng trong màn hình đo bằng pixel. Bạn có thể sử dụng các tọa độ x và y của đối tượng như mục tiêu của scrollTo () phương pháp cho cửa sổ nó sống in | JavaScript Programmer s Reference Property method value type JavaScript syntax Number primitive N The vertical position of the object in the display measured in pixels. You can use the x and y coordinates of the object as targets of the scrollTo method for the window it lives in. Warnings This is withdrawn from Netscape and no longer supported. See also URN Definition A Uniform Resource Name. The URN notation is an alternative means of formatting the URI portion of a URL. This is a standard which is in the process of being defined and deployed. Details are available in RFC 2141. The format is somewhat different to that of a URL placed in an HREF . HTML tag attribute. It is not at present widely supported in browsers but may be in the future. See also UDI URI URL User-generated object Definition An object created under script control. JavaScript allows the user or script developer really to create their own objects properties and methods. The prototypes for existing built-in objects can also be extended by the script developer. This has generally been supported since the earliest versions of the main JavaScript interpreters. It was made available in the WebTV platform effective from the Summer 2000 release. This means that DHTML effects created by authoring tools such as DreamWeaver should work better in WebTV boxes that are shipped after this date or are upgraded in the field. See also JellyScript 2356 U - userDefined object Object DOM userDefined object Object DOM You can define your own objects in several different ways. Availability DOM level - 1 JavaScript - JScript - Internet Explorer - Netscape version - JavaScript syntax - myObject new Function - myObject new Object Aside from the ways in which you can create custom objects with your own constructor functions you can also create your own HTML tags to make custom document elements. Objects are instantiated from HTML tags and assume a class name from the HTML tag names in

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