<script type = "text/javascript" language = "javascript"> function clear1() { if(confirm("确定要清空数据吗?")) { document.main.text1.value = ""; } } </script> <body> <form name="main"> <input type="text" name="text1" /> <input type="button" name="Submit" value="清空数据" onClick="return clear1();"> </form> </body>
confirm的用法 一般用于按钮操作时确定是否执行,布布扣,bubuko.com
原文:http://www.cnblogs.com/dnxf/p/3795558.html