A helper for http://regexcrossword.com. It helps identify which patterns are not met in a non-boolean fashion. It's a spoiler, so use sparringly. Also, please note that not all situations are accounted for (empty spaces, greedy vs non-greedy matching).

Regex-Crossword-helper.js

window.CrossCrutch = {}

window.CrossCrutch.check = function() {
    var messages = [];
    
    $(".puzzle table tbody tr").each(function (i,e) {
        var $row = $(e);
        var $cols = $row.find("th,td");
        var $rowHeader = $cols.filter("th");
        var $other = $cols.filter("td");
    
        var re = new RegExp($rowHeader.html());
        
        var txt = "";
        $other.each(function(i,e) {
            txt += $(e).find("input").val().toUpperCase();
        });
        
        if (!txt.match(re)) {
            messages.push("Pattern "+re+" does not match ["+txt+"]");
            $rowHeader.css("color","#FF0000");
        }
        else {
            $rowHeader.css("color","");
        }
    });
    
    $(".puzzle table thead th:not(:first)").each(function (iRow,e) {
        var $headCell = $(e);
        var re = new RegExp($headCell.find("span").html());
        
        var txt = "";
        var $rows = $(".puzzle table tbody tr");
        $rows.each(function(i,e) {
            txt += $(e).find("input")[iRow].value.toUpperCase();
        });
    
        if (!txt.match(re)) {
            messages.push("Pattern "+re+" does not match ["+txt+"]");
            $headCell.css("color","#FF0000");
        }
        
        else {
            $headCell.css("color","");
        }
    });
    
    var $msgs = $("#msgs");
    if (messages.length > 0) {
    
        if ($msgs.size() < 1) {
            $("#main form:first").before('<div class="alert alert-error" id="msgs" ></div>');
            $msgs = $("#msgs");
        }
        else 
        
            $msgs.find('*').remove();
        
        var msg, _i, _len;
        for (_i = 0, _len = messages.length; _i < _len; _i++) {
        
          msg = messages[_i];
          $msgs.append($("<p></p>").html(msg));
        }
    }
    else {
        $("#msgs").hide();
    }
};

$("#main form").on('click','input[type=submit]',window.CrossCrutch.check);