1 <script type="text/javascript"> 2     function checkAll(name) { 3         var el = document.getElementsByTagName(‘input‘); 4         var len = el.length; 5         for (var i = 0; i < len; i++) { 6             if ((el[i].type == "checkbox") && (el[i].name == name)) { 7                 el[i].checked = true; 8             } 9         }10     }11     function clearAll(name) {12         var el = document.getElementsByTagName(‘input‘);13         var len = el.length;14         for (var i = 0; i < len; i++) {15             if ((el[i].type == "checkbox") && (el[i].name == name)) {16                 el[i].checked = false;17             }18         }19     }20 </script>

1     <form action="result.jsp">2         <input type="checkbox" name="test1" value=""3             onclick="if(this.checked==true) { checkAll(‘test‘); } else { clearAll(‘test‘); }" />4         字母全选开关 <input type="checkbox" name="test" value="a" /> a <input5             type="checkbox" name="test" value="b" /> b <input type="checkbox"6             name="test" value="c" /> c <input type="checkbox" name="test"7             value="d" /> d <input type="submit" value="submit" />8     </form>

1 <%2         String list[] = request.getParameterValues("test");3     for(String s:list){4     %>5     <%=s %>6     <%} %>