function otk(n){
        e=document.getElementsByTagName("TABLE");
        for(i=0;i<e.length;i++){
                if (e[i].id.indexOf('tabhid'+n)!=-1){
                        if (e[i].style.visibility=="hidden") {
                                e[i].style.visibility="visible";
                                e[i].style.position="relative";
                        }else {
                                e[i].style.visibility="hidden";
                                e[i].style.position="absolute";
                        }
                }
        }
}