jquery return value from element by [data-?] attribute code example
Example 1: jquery get data attribute value
/* html */
<a data-id="123">link</a>
/* js */
$(this).attr("data-id") // returns string "123"
$(this).data("id") // returns number 123 (jQuery >= 1.4.3 only)
Example 2: jquery find div with data attribute value
$("body").find("[data-searchme='" + var_value + "']");