Check url for particular string using jquery

$(document).ready(function () {

  var loc = window.location.hostname;
    alert(loc);

   if (loc = "xyzvalue.com") {
   //do some operation
   }

});

I am using above jquery to get current url in jquery.Aler开发者_StackOverflow中文版t will show xyzvalue.com as popup. Now I want to check for "value" string in xyzvalue.com.

if (loc = "xyzvalue.com") {

should be

if (loc == "xyzvalue.com") {