How to get inner element using parent object without using parent and children jquery function

I am having

<div id=test>
<div class="a"> </div>
<div class="b"> </div>
<div class="c"> </div>
</div>

i have to get third div i.e class name with c using parent obj.

For eg if i do $("#test .c") i am getting element.

But i am unable to 开发者_StackOverflow中文版get element using parent element as object for eg

var obj = $("#test");
$(obj+".c") 

is not giving me output. It is giving me error "Syntax error, unrecognized expression: [object Object]"

Please let me know how it is possible. Thanks in advance.

---

Search for the element with class c within the context of the jQuery Object:

var obj = $("#test");
$(".c", obj);

Alternatively you could use:

obj.find(".c");

Or:

$(obj.selector+" .c");

---

Try

obj.find('.c');

More info on find in the jquery docs

---

Thats because you combine an object and class selector.

Try

var obj = $("#test");
var objID = obj.attr('id');
$(objID+".c") 

Else you could do it with the object like

var obj = $("#test");
$(obj).children('.c')

---

var objC = $("#test .c");

would select all c's inside test's