function cmf_isMail(obj,msg,alt,fcs)
{
	
   var filter  = /^([a-zA-Z0-9_])+\@(([a-zA-Z0-9])+\.)+([a-zA-Z0-9]{2,4})+$/;    // forbidden with . Eg: chien.pham
    var rtn = filter.test(obj.value+"@mobifone.com.vn");
    if (rtn == false) 
    {
        if (alt == "1") { alert(msg) }
        if (fcs == "1") { obj.focus() }
    }
    return rtn
}


function cmf_isMailWithDomain(obj,msg,alt,fcs){
   var filter  = /^([a-zA-Z0-9_])+\@(([a-zA-Z0-9])+\.)+([a-zA-Z0-9]{2,4})+$/;    // forbidden with . Eg: chien.pham
    var rtn = filter.test(obj.value);
    if (rtn == false) 
    {
        if (alt == "1") { alert(msg) }
        if (fcs == "1") { obj.focus() }
    }
    return rtn
}