Answers for "jquery selector"

select a form by name jquery

var frm = $('form[name="frmSave"]');

jquery selector this and class

$(".class").click(function(){
     $(this).find(".subclass").css("visibility","visible");
});

jquery find tag and class

$(".txtClass")                  =>  getElementsByClassName()

$("#childDiv2 .txtClass")       =>  getElementById(),
                                    then getElementsByClassName()

$("#childDiv2 > .txtClass")     =>  getElementById(),
                                    then iterate over children and check class

$("input.txtClass")             =>  getElementsByTagName(),
                                    then iterate over results and check class

$("#childDiv2 input.txtClass")  =>  getElementById(),
                                    then getElementsByTagName(),
                                    then iterate over results and check class

jquery class selector

$('.class').jquery_function();

selector in jquery

$("*")                      // all elements
$("p.demo")                 // <p> elements with class="intro"
$("p:first")                // the first <p> element
$("p span")                 // span, descendant of p
$("p > span")               // span, direct child of p
$("p + span")               // span immediately proceeded by a p
$("p ~ span")               // strong element proceeded by p
$("ul li:first")            // the first <li> element of the first <ul>
$("ul li:first-child")      // the first <li> element of every <ul>
$("ul li:nth-child(3)")     // third child
$("[href]")                 // any element with an href attribute
$("a[target='_blank']")     // <a> elements with a target "_blank" attribute
$("a[target!='_blank']")    // <a> elements with a target attribute value other than "_blank"
$(":input")                 // all form elements
$(":button")                // <button> and <input> elements of type="button"
$("tr:even")                // even <tr> elements
$("tr:odd")                 // odd <tr> elements
$("span:parent")            // element which has child element
$("span:contains('demo')")  // element conaining the specified text