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US6011555A Method and apparatus for a drop down control that changes contents dynamically 失效
用于动态改变内容的下拉控制的方法和装置

Method and apparatus for a drop down control that changes contents
dynamically
摘要:
A dynamic drop down control divides a drop down list into a plurality of sections. At least a first section has categories listed therein and at least a second section has items specific to a selected category listed therein. As the selected category is changed, so is the specific items listed in the second section.
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