function foc(fieldname) {
                if(document.forms[0] != null) {
                        var a = document.forms[0];
                        for(i=0; i < a.elements.length; i++) {
                           var b = a.elements[i].name;
                           if(b.slice(b.lastIndexOf(".")+1,b.length) == fieldname)
                              a.elements[i].focus();
                        }
                }
        }