function toggle_checkbox(obj) {
    for(i=0; i < obj.elements.length; i++) {
        if(obj.elements[i].type == 'checkbox' && obj.elements[i].name != 'cb_all') obj.elements[i].checked = obj.elements['cb_all'].checked;
    }
}

window.onload = function() {
    if(document.forms['fpwd']) {
        document.forms['fpwd'].elements['opwd'].value = '';
    }
}