$(document).ready( function() {
    $("#essentials_side li a").each( function() {
        var url = document.URL.split("#");

        if ( this == url[0] || this + "index.html" == url[0]) {

						$(this).parent().children("a").css("font-weight","bold");
  					$(this).parent().children("a").css("color","#0099cc");
						$(this).parent().children("a").css("background-color","#e1e1e1");
        }
    });
});