function Logout(){
    eraseCookie("ContactID");
    //alert('back');
    window.location.href="index.html";
    
}
function eraseCookie(name) {
    //alert(name);
    createCookie(name,"",-1);
}

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
    
    //alert(document.cookie);
    //document.cookie.
    
}