function ShowHideDiv(Obj){
    var el=document.getElementById(Obj);
    el.style.display=(el.style.display != 'block')? 'block':'none';
}

function isValidEmail (email, strict) {
    if ( !strict ) email = email.replace(/^\s+|\s+$/g, '');
    return (/^([a-z0-9_\-]+\.)*[a-z0-9_\-]+@([a-z0-9][a-z0-9\-]*[a-z0-9]\.)+[a-z]{2,4}$/i).test(email);
}

function trim (str) {
    str = str.replace(/^\s+/, '');
    for (var i = str.length - 1; i >= 0; i--) {
        if (/\S/.test(str.charAt(i))) {
            str = str.substring(0, i + 1);
            break;
        }
    }
    return str;
}