js 批量获取chekbox的值和title值

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页面中得代码是这样的：

<td class="tdcenter"><input  type="checkbox" name="checkboxid" value="<?php echo $v['id'];?>"/></td>   <td style="word-break:break-all"><input type="hidden" name="<?php echo $v['id'];?>_ding_keywords" id="<?php echo $v['id'];?>_ding_keywords" value="<?php echo $v['keyword']; ?>" /><?php echo $v['keyword']; ?></td>

js代码如下：

function getKeywordsTitle(){var selids='';var newArr = Array();var box = document.getElementsByTagName("input"); //var keywords = document.getElementsByTagName("ding_keywords"); var j=0;for (var i=0;i<box.length;i++ ){if(box[i].type=="checkbox"){if(box[i].checked==true){ var aa = box[i].value;newArr[j]=document.getElementById(aa+"_ding_keywords").value;j++;}}}selids=newArr.join(",");//selids = selids.substr(0,selids.length-1); return selids;}//选择多条记录 返回idfunction getids(){var selids='';var box = document.getElementsByTagName("input"); for (var i=0;i<box.length;i++ ){if(box[i].type=="checkbox"){if(box[i].checked==true){ selids += box[i].value+','; }}}selids = selids.substr(0,selids.length-1); return selids;}

if(isTitle==1){//alert(getKeywordsTitle());document.getElementById('ding_keywords').innerHTML=getKeywordsTitle();}