设置隐藏输入的值 [英] Setting the value of a hidden input

问题描述

这个想法：我通过常规的Javascript或jQuery设置type =hidden的输入值。

问题：jQuery和document都没有。 getElementById会找到隐藏的输入，即使我确定选择器是正确的，并且没有冲突的元素。

代码：
我可以'因为当我看着它时，它充满了相当复杂的PHP，让我感到困惑。

以下是javascript：

  $（＃+ input.id.substr（0,2）+_budget_hidden）。val（budg_total）; 
  

注意：选择器没有问题，输入是我用来引用隐藏的元素。

这里是HTML：

 < input type =hiddenname =s<？= $ step_counter？> _budget_hidden
 id =s<？= $ step_counter？> _budget_hiddenvalue = 0/> 
  

这段代码与上下文无关，但它更像是Javascript的一个常见问题，而不是语法错误。在 $（＃+ input.id.substr（0,2））中找到


解决方案 +_budget_hidden）。val（budg_total）; 你在隐藏的id中的第一个下划线之前取两个字符。然而，您的隐藏ID只有一个字符''''''''''''''''''$ / $>在问题编辑之前隐藏<？=？>

body onload事件？
EX：

  $（document）.ready（function（）{
 $（＃ + input.id.substr（0,2）+_budget_hidden）。bind（keyPressed，function（）{
 $（＃+ input.id.substr（0,2）+_budget_hidden ）.val（budg_total）; 
} 
}）; 
  

The idea: I'm setting the value of an input with type="hidden" via regular Javascript or jQuery.

The issue: neither jQuery nor document.getElementById will find the hidden input, even though I'm absolutely sure the selector is correct and there are no conflicting elements.

The code: I can't really post much of it, because it's full of rather complicated PHP that confuses me when I just look at it.

Here's the javascript:

$("#" + input.id.substr(0,2) + "_budget_hidden").val(budg_total);

Note: there's nothing wrong with the selector, and the "input" is a different element that I'm using to reference the hidden.

Here's the HTML:

<input type="hidden" name="s<?=$step_counter?>_budget_hidden" 
       id="s<?=$step_counter?>_budget_hidden" value="0" />

The code is kind of out of context, but it's more of a general problem with Javascript than a syntactical error. Thoughts?

解决方案

In $("#" + input.id.substr(0,2) + "_budget_hidden").val(budg_total); you take two chars before the first underscore in your hidden id. However your hidden id have only one char 's'

EDIT

Ok the <?= ?> was hidden before the question edit.

Do you call your script after the body onload event? EX:

$(document).ready(function(){
    $("#" + input.id.substr(0,2) + "_budget_hidden").bind("keyPressed",function(){
        $("#" + input.id.substr(0,2) + "_budget_hidden").val(budg_total);
     }
});

这篇关于设置隐藏输入的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！