Finding div id on the basis of its class name

I have to find div id on the basis of its class, if the div have class named searchItemSelected, then how to get its div id.

<div id="CheckinWithUser_4" class="CheckinWithUserRow1 searchItemSelected" onclick="" style="overflo开发者_StackOverflow社区w: visible; height: 40px;">

All attributes of an element can be accessed through the .attr() method:

var id = $('.searchItemSelect').attr('id');

Try .hasClass()

var mymarkup = '<div id="CheckinWithUser_4" class="CheckinWithUserRow1 searchItemSelected" onclick="" style="overflow: visible; height: 40px;">';

if ($(mymarkup).hasClass("searchItemSelected")) 
{
    alert(this.id);
}