//下一个div function next() { var arr = document.getElementById('tdBjzbsx').getElementsByTagName('div'); for (i = 0; i < arr.length-1; i++) { if ((arr[i].style.display == "block"||arr[i].style.display == "") && i <= 2) { arr[i + 1].style.display = "block"; arr[i].style.display = "none"; } } } //上一个div function top() { var arr = document.getElementById('tdBjzbsx').getElementsByTagName('div'); for (i = 0; i < arr.length; i++) { if ((arr[i].style.display == "block"||arr[i].style.display == "") && i <= 3) { arr[i - 1].style.display = "block"; arr[i].style.display = "none"; break; } } }

<table> <tr> <td id="tdBjzbsx"> <div id="div1"> 1 </div> <div id="div2" style="display: none"> 2 </div> <div id="div3" style="display: none"> 3 </div> </td> <td> <input type="button" value="上一步" id="syb" name="cz2" onclick="javascript:top()" disabled="true"/></br></br> <input type="button" value="下一步" id="xyb" name="cz3" onclick="javascript:next()"/></br></br> </td> </tr> </table>