function check_all(name,formid) {
        
        formblock= document.getElementById(formid);
        forminputs = formblock.getElementsByTagName('input');
        
        for (i = 0; i < forminputs.length; i++) 
        {
                // regex here to check name attribute
                var regex = new RegExp(name, "i");
                if (regex.test(forminputs[i].getAttribute('name'))) 
                {
                        if (forminputs[i].checked ) 
                        {
                                forminputs[i].checked = false;
                        } else 
                        {
                                forminputs[i].checked = true;
                        }
                }
        }
        return false;
}


<!--

    function verifyAction(message) {

        return confirm(message)

    }