$(document).ready(function() {
    $("area").hover(function(){
        var thisTitle = $(this).attr("title");
        var thisBlurIndex = parseInt($("#" + thisTitle).attr("data-blurindex"));
        $("#photoframe .blurable").each(function(){
            var newBlurIndex = Math.abs(thisBlurIndex - parseInt($(this).attr("data-blurindex")));
            $(this).css("-webkit-filter","blur(" + newBlurIndex + "px)");
        });
    });
});