JavaScript实现复选框全选与批量删除功能详解

<td align="center" width="12%" >
 <input type="checkbox" id="allChecks" onclick="ckAll()" /> 全选/全不选
</td>

//全选
 function ckAll(){
 var flag=document.getElementById("allChecks").checked;
 var cks=document.getElementsByName("check");
 for(var i=0;i<cks.length;i++){
 cks[i].checked=flag;
 }
 }

<td style="CURSOR: hand; HEIGHT: 22px" align="center"
 width="23">
 <input type="checkbox" name="check" value="${book.id}"/> 
</td>

//批量删除
 function delAllProduct(){
 if(!confirm("确定要删除这些图书吗？")){
 return ;
 }
 var cks=document.getElementsByName("check");
 var str="";
 //拼接所有的图书id
 for(var i=0;i<cks.length;i++){
 if(cks[i].checked){
 str+="id="+cks[i].value+"&";
 }
 }
 //去掉字符串末尾的‘&'
 str=str.substring(0, str.length-1);
 location.href="${pageContext.request.contextPath}/servlet/delAllBooksServlet?" rel="external nofollow" +str;
 }