为啥所有按钮只控制同一行数据？-PHP Tutorial-php.cn

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为啥所有按钮只控制同一行数据？

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Jun 23, 2016 pm 02:03 PM

为啥所有按钮只控制同一行数据？应该怎么解决啊。

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><script language="javascript" type="text/javascript">         function showtd(num) {                         document.getElementById("bg"+num).style.display = "none";             document.getElementById("show"+num).style.display = "block";             document.getElementById("ba"+num);             document.getElementById("gn"+num);         }         function hidetd(num) {             document.getElementById("bg"+num).style.display = 'block';             document.getElementById("show"+num).style.display = 'none';         }		function showtext(){			document.getElementById("a").removeAttribute("readOnly");			document.getElementById("b").removeAttribute("readOnly");			document.getElementById("c").removeAttribute("readOnly");			document.getElementById("d").removeAttribute("readOnly");			document.getElementById("e").removeAttribute("readOnly");			document.getElementById("f").removeAttribute("readOnly");			}		function hidetext(){			document.getElementById("a").readOnly="true";			document.getElementById("b").readOnly="true";			document.getElementById("c").readOnly="true";			document.getElementById("d").readOnly="true";			document.getElementById("e").readOnly="true";			document.getElementById("f").readOnly="true";			}     </script></head><body>	<form>		<table border="1">	<?php	$db = mysql_connect('localhost','root','root');	mysql_select_db('ec',$db);	if (!$db)	  {	  die('Could not connect: ' . mysql_error());	  }	$result = mysql_query("select * from goods");	echo "<tr>		<th>GoodsID</th>		<th>BarCode</th>		<th>GoodsName</th>		<th>Category</th>		<th>Specifications</th>		<th>Manufacturers</th>		<th>Numbers</th>		<th>Instructions</th>		<th>Pictures</th>		<th>Update</th>		<th>Delete</th>	</tr>";	$n = 0;	while($row = mysql_fetch_array($result))	  {	  echo "<tr>";	  echo "<td>" . $row['id'] . "</td>";	  echo "<td>" . "<input type='text' id='a' value='$row[barcode]' style='width:60px;border:0px' readOnly>" . "</td>";	  echo "<td>" . "<input type='text' id='b' value='$row[goods_name]' style='width:90px;border:0px' readOnly>" . "</td>";	  echo "<td>" . $row['category'] . "</td>";	  echo "<td>" . "<input type='text' id='c' value='$row[specifications]' style='width:90px;border:0px' readOnly>" . "</td>";	  echo "<td>" . "<input type='text' id='d' value='$row[manufacturers]' style='width:90px;border:0px' readOnly>" . "</td>";	  echo "<td>" . "<input type='text' id='e' value='$row[number]' style='width:60px;border:0px' readOnly>" . "</td>";	  echo "<td>" . "<input type='text' id='f' value='$row[instruction]' style='width:80px;border:0px' readOnly>" . "</td>";	  echo "<td>" . "<img  src = '$row[picture_url]'   style="max-width:90%"/ alt="为啥所有按钮只控制同一行数据？" >" . "</td>";	  echo "<td id='bg$n'>".     		"<input id='btnshow$n' type='button' value='Update' onclick='showtd($n);showtext()' />".     		"</td>".     		"<td id='show$n' style='display:none'>".         	"<input id='btnclose$n' type='button' value='Save' onclick='hidetd($n);hidetext()'/>".     		"</td>";	  echo "<td>"."<a href='delete.php?id=$row[id]'>"."Delete"."</a>"."</td>";	   	echo "</tr>";	  	++$n;	  }		mysql_close($db);?>	</table></form></body></html>

回复讨论(解决方案)

总觉得你这代码有一堆语法问题啊

总觉得你这代码有一堆语法问题啊
可以正常运行。

循环输出有多少个id='a'呢？

然后 document.getElementById("a") 会得到什么……

什么情况？数据库读出来ID都对的吧？这个应该id有传过去吧，再试试吧~

循环输出有多少个id='a'呢？

然后 document.getElementById("a") 会得到什么……
我也觉得是这个id的问题，就是不知道怎么改。

什么情况？数据库读出来ID都对的吧？这个应该id有传过去吧，再试试吧~
a标签读出来的id是我在数据库内设置的主键，和d的id是两码事。

引用 1 楼 chendong_j 的回复:
总觉得你这代码有一堆语法问题啊

可以正常运行。

顿时感觉lz好强大

你每行同一列的 id 都相同，怎么能用 getElementById 来定位呢？

65-71行设置的id都是重复的如果区分的话可以把设置的ID（a,b,c...）前拼接上$row['id']加以区分

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