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                1、執行一段 空白JAVASCRIPT語句 并且<span style="color:red;">返回的是空或者false值</span>。就終止了,相當于return false。 2、把 javascript:; 加在超級鏈接上 就可以<span style="color:red;">防止 鏈接跳轉</span>..從而 可以給 鏈接的 onclick 方法上 寫 自己想執行的代碼.. 例子 ``` html <!--這個鏈接不會跳轉,但會執行里面的onclick方法--> <a href="javascript:;" onclick="javascript:alert('鏈接不要跳轉.');">我是一個超級鏈接</a> ```
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