/^\s*(\w+)\s*=\s*([\"|\'])(.*?)\2(.*)/.exec(...)

var attrStr = cm.cellattr.call(...), matches, name, value, quote, tilteValue, classes = "";
if (attrStr && typeof attrStr === "string") {
    // ??? probably one can create object with properties from the attrStr
    // and then to use one common function with constructTr to combin the default
    // properties with the properties used in cellattr and rowattr.
    // Probably one could use $.extend with the most attributes. The exception are
    // only class and style attributes which hold multi-values with " " or ";" as separator
    while (true) {
        // we have to use ? in the construction ([^\2]*?) to have non-greedy (lazy, minimal) matching
        // so that we will find the FIRST closing quote instead of default the LAST matching.
        matches = /^\s*(\w+)\s*=\s*([\"|\'])(.*?)\2(.*)/.exec(attrStr);
        if (matches === null || matches.length < 5) {
            ... // need nothing to done one need use styleValue, classes and tilteValue
                // to generate the results
        }
        name = matches[1].toLowerCase();
        quote = matches[2]; // one should better use the character to quote the value matches[3]
        value = matches[3];
        attrStr = matches[4];
        switch (name) {
            case "class":
                // if some spetial characters are inside of class value there MUST be escaped
                // so we can use any quote characters (' or ") around the call value.
                // So we don't need to save quote used in class attribute
                if (classes) {
                    classes += " " + value;
                } else {
                    classes = value;
                }
                break;
            case "title":
                tilteValue = value;
                break;
            case "style":
                styleValue += value;
                break;
            default:
                rest += " " + matches[1] + "=" + quote + value + quote;
                break;
        }
    }
}