[s0Creator]

если не усложнять:

Код:

var Cookies = {};
Cookies.set = function ( sName, sValue, nHours ) {
    var expires = "";
    if ( nHours ) {
        var d = new Date();
        d.setTime( d.getTime() + nHours * 60 * 60 * 1000 );
        expires = "; expires=" + d.toGMTString();
    }

    document.cookie = sName + "=" + sValue + expires + "; path=/";
};
 

Cookies.get = function (sName) {
    var re = new RegExp( "(\;|^)[^;]*(" + sName + ")\=([^;]*)(;|$)" );
    var res = re.exec( document.cookie );
    return res != null ? res[3] : null;
};

Cookies.remove = function ( name ) {
    Cookies.set( name, "", -1 );
};

var my_schet = Cookies.get('m_cnt');
if ( my_schet == null) my_schet = 0;
my_schet++;
Cookies.set('m_cnt',my_schet,1);
if(my_schet < 10) {
    // вот тут делай что тебе надо
}