Delete cookies using java script

You can use below java script to delete all the cookies.

function deletecookies()
{
var cookies = document.cookie.split(";");
for(var i=0; i < cookies.length; i++) {
var equals = cookies[i].indexOf("="),
name = equals > -1 ? cookies[i].substr(0, equals) : cookies[i];
document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT";
}

alert(document.cookie);
}