[grefon]

Сам javascript:

<SCRIPT LANGUAGE="JavaScript">

function readCookie(name) { 
var xname = name + "="
var xlen = xname.length
var clen = document.cookie.length
var i = 0
while(i < clen){
       var j = i + xlen
       if (document.cookie.substring(i, j) == xname)
		return getCookieVal(j)
       i = document.cookie.indexOf(" ",1) + 1
       if (i == 0)  break
}
return null
}

function getCookieVal(n){
var endstr = document.cookie.indexOf(";", n)
if (endstr == -1)
	endstr = document.cookie.length
return unescape(document.cookie.substring(n, endstr))
}

function writeCookie(name, value, expires, path, domain, secure) {
document.cookie = 
name +"=" + escape(value) +
((expires) ? "; expires="  + expires.toGMTString() : "") +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
((secure) ? "; secure" : "")
}
</SCRIPT>

Код вызыва функции:

<a href="#" onclick="writeCookie('name', '23'); show1(); return false;">Есть</a>

show1(); return false; - это еще из другого скрипта выполняется.