Rette cookie sat i Javascript i Asp

Jeg har sat en cookie i java script:

<script language="javascript" type="text/javascript">
<!--
var intCookie = document.cookie;

var today = new Date();
var expiry = new Date(today.getTime() + 28 * 24 * 60 * 60 * 1000);

function setCookie(name, value) {
    if(value != null && value != "")
        document.cookie=name + "=" + escape(value) + "; expires=" + expiry.toGMTString();
    intCookie = document.cookie;
}

setCookie("minCookie","test1");
//-->
</script>

Hvorfor/hvordan opdatere jeg den med Asp

<%Response.Cookies("minCookie") = "test2"%>

????