可用性指南：可访问性

3.9：提供客户端图像映射

相关重要指数：3级

证据强度：3级

文件类型：指南

主题：

可访问性

指南：

若要提高可访问性, 请提供客户端图像映射, 而不要使用服务器端图像映射。

注释：

客户端图像映射完全可访问，而如果不对映射的每个部分使用文本替代，使用服务器端图像映射则无法访问。若要使客户端图像映射可访问, 请将文本alt属性分配给映射中的每个区域。确保为服务器端图像映射的每个活动区域提供冗长的文本链接。

资源：

1. United States Government, Rehabilitation Act of 1973 (amended in 1998), Section 508. Retrieved November 2005,

相关资源：

1. Title: Section 508.Description: Section 508 requires that Federal agencies' electronic and information technology is accessible to people with disabilities. IT Accessibility & Workforce Division, in the U.S. General Services Administration's Office of Governmentwide Policy, has been charged with the task of educating Federal employees and building the infrastructure necessary to support Section 508 implementation. Using this web site, Federal employees and the public can access resources for understanding and implementing the requirements of Section 508.

2. Title: Web Accessibility Initiative.Description: Guidelines widely regarded as the international standard for Web accessibility

3. Title: WebAIM Section 508 Checklist.Description: Provides a checklist of 508 items for HTML.

相关可用性指南;

1. Usability Guideline: Comply with Section 508

2. Usability Guideline: Label Clickable Images

3. Usability Guideline: Use Video, Animation, and Audio Meaningfully