简单的javascript实现全选、删除

<input type="button" onclick="checkAll();" value="全选"/><input type="checkbox" id="ids" name="ids" value=""/>function checkAll(){ var ids=document.getElementsByName('ids'); for(i=0;i<ids.length;i++) ids[i].checked=true;} function uncheckAll(){var ids = document.getElementsByName('ids');for(i=0;i<ids.length;i++){ids[i].checked = false;}}function del(){var form = document.getElementById('form1');var ids = document.getElementsByName('ids');var ischecked = false;for(i=0;i<ids.length;i++){if(ids[i].checked)ischecked = true;}if(!ischecked){alert("请选择要删除的数据!")return ischecked;}if(confirm('您确定删除吗？')){return true;}else{return false;}}