/*------------------------------------------------------------------*/
/*  Kiem tra object empty                                           */
/*    obj       :			                                        */
/*    msg       : message can thong bao                             */
/*    alt       : co alert ra hay khong                             */
/*    fcs       : co focus tro lai hay khong                        */
/*------------------------------------------------------------------*/
function cmf_isEmpty(obj,msg,alt,fcs) {
    var rtn = cmf_isEmpty2(obj.value);
    if (rtn == true) {
        if (alt == "1") { alert(msg); }
        if (fcs == "1") { obj.focus(); }
    }
    return rtn;
}

function cmf_isEmpty2(inputstr) {
    if (inputstr == null || inputstr == "") {
        return true;
    }
    for (var i = 0; i < inputstr.length; i++) {
        var onechar = inputstr.charAt(i);
        if (onechar != " ") {
            return false;
        }
    }
    return true;
}


function cmf_isSelectEmpty(obj,msg,v_alt,v_fcs) {
    if (obj.selectedIndex==0||obj.selectedIndex=="") {
        if (v_alt == 1) { alert(msg); }
        if (v_fcs == 1) { obj.focus(); }
        return true;
    }
    return false;
}