jQuery img选择 [英] jquery img select

问题描述

我有一个带有img的h4，就像这样.我将点击功能绑定到h4.这很好.但是我无法选择其中的img.我想选择img，以便使用.attr("src").replace("up"，"down");替换src attr.

I have a h4 with an img in it like this. I bind a click function to the h4. This works well. But I'm not able to select the img in it. I want to select the img in order to replage the src attr with .attr("src").replace("up", "down"); .

<h4 class="collapsable_head">
<img id="up_down" class="icon" src="/crm/img/modifier_down.gif" alt="link"/>
<b>Classification Filter:</b>
</h4>

javascript:

The javascript:

$(".collapsable_head").click(function(){
   $(this).next(".collapsable_body").slideToggle(500)
   //None of the next lines return me the img object
   src = jQuery(this).children('img').attr("src");
   print(src);
   src = $(this).next("#up_down").attr("src");
   print(src);
   src = $(this).next("#up_down").attr("src");
   print(src);
   return false;
});

我想使用关键字"this"，因为那里有更多(".collapsable_head");-)

I want to use the keyword "this", since I have more (".collapsable_head")'s out there ;-)

推荐答案

var img = $("img", this); // Gets the image within 'this'

第二个参数是选择器的上下文.在完整代码中，它看起来像这样:

The second parameter is the context of the selector. In full-code, it looks like this:

$(".collapsable_head").click(function(){
  var img = $("img:first", this).attr("src");
  alert(img);
});

这篇关于jQuery img选择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！