http://domain.com/search/?wpv_paged_preload_reach=1&wpv_view_count=1&wpv_post_id=205499&wpv_post_search=saint%20laurent&wpv_filter_submit&wpv-women-clothing%5B0%5D=all-clothing

var url = $(location).attr('href');

if (last character in code containers an integer) {
    do something
}

url.charAt( url.length - 1 )

var lastChar = $(location).attr('href').charAt( $(location).attr('href').length - 1 );

url.substr(-1)