Javascript获取表行TR的单元格 [英] Javascript get cells of a table row TR

问题描述

我想使用javascript操纵表格单元格，到目前为止，我设法使用以下方式进入tr-s：

  var as = document.getElementById（'answers ['+ id +']'）; 
 var trs = as.getElementsByTagName（tr）; 
（var i in trs）
 {...} 
  

更新：如表所示。

在循环中，我想去同一个登录行，我尝试过：

  var tds = trs [i] .getElementByTagName（td）; 
  

问题是在调试时我收到以下错误：

 未捕获TypeError：Object＃< HTMLTableRowElement>没有方法'getElementByTagName'。 
  

如何进入trs的td？

解决方案

其 getElementsByTagName 而不是 getElementByTagName

  var as = document.getElementById（'answers ['+ id +']'）; 
 for（var i = 0; i< as.rows.length; i ++）{
 var trs = as.getElementsByTagName（tr）[i]; 
 var cellVal = trs.cells [0] 
} 
  

变量 cellVal 将引用第一个单元格或< td> 类似地，通过增加索引或将其放在循环中将使所有单元格变为动态...

I want to manipulate table cells with javascript, and so far I managed to get into tr-s, by using:

var as = document.getElementById('answers['+id+']');
var trs = as.getElementsByTagName("tr");
for (var i in trs)
{ ... }

UPDATE: The as is the table.

Inside of the for cycle I wanted to go on the same login line and I have tried:

var tds = trs[i].getElementByTagName("td");

The problem is that on debugging I get the following error:

Uncaught TypeError: Object #<HTMLTableRowElement> has no method 'getElementByTagName' .

How could I get into the td-s of the tr-s?

解决方案

its getElementsByTagName and not getElementByTagName

var as = document.getElementById('answers['+id+']');
for(var i=0;i<as.rows.length;i++) {
    var trs = as.getElementsByTagName("tr")[i];
    var cellVal=trs.cells[0]
}

the variable cellVal will give the reference to the first cell or <td> similarly do for all the cells by increasing the index or putting it in a loop would make it dynamic...

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