function check()
{
    if(document.getElementById("txt_name").value=="")
    {
        alert("Please enter name!!");
        document.getElementById("txt_name").focus();
        return false;
    }
    else
    {
        if(document.getElementById("txt_address").value=="")
        {
            alert("Please enter address!!");
            document.getElementById("txt_address").focus();
            return false;
        }   
        else
        {
            if(document.getElementById("txt_occuption").value=="")
            {
                alert("Please enter occuption!!");
                document.getElementById("txt_occuption").focus();
                return false;
            }   
            else
            {
                if(document.getElementById("txt_occuption").value=="")
                {
                    alert("Please enter occuption!!");
                    document.getElementById("txt_occuption").focus();
                    return false;
                }   
                else
                {
                    if(document.getElementById("txt_phone").value=="")
                    {
                        alert("Please enter phone number!!");
                        document.getElementById("txt_phone").focus();
                        return false;
                    }   
                    else
                    {
                        if(document.getElementById("txt_cell_no").value=="")
                        {   
                            alert("Please enter mobile number!!");
                            document.getElementById("txt_cell_no").focus();
                            return false;
                        }   
                        else
                        {
                            if(document.getElementById("txt_email_id").value=="")
                            {   
                                alert("Please enter email id!!");
                                document.getElementById("txt_email_id").focus();
                                return false;
                            }   
                            else
                            {
                                if(document.getElementById("txt_fax").value=="")
                                {   
                                    alert("Please enter fax!!");
                                    document.getElementById("txt_fax").focus();
                                    return false;
                                }   
                                else
                                {
                                    if(document.getElementById("txt_country").value=="")
                                    {   
                                        alert("Please enter country name!!");
                                        document.getElementById("txt_country").focus();
                                        return false;
                                    }   
                                    else
                                    {
                                        if(document.getElementById("txt_city").value=="")
                                        {   
                                            alert("Please enter city name!!");
                                            document.getElementById("txt_city").focus();
                                            return false;
                                        }   
                                        else
                                        {
                                            if(document.getElementById("txt_date_of_tour").value=="")
                                            {   
                                                alert("Please enter expacted date of tour!!");
                                                document.getElementById("txt_date_of_tour").focus();
                                                return false;
                                            }  
                                            else
                                            {
                                                if(document.getElementById("dd_catagory").value=="Select")
                                                {   
                                                    alert("Please select a hotel category!!");
                                                    document.getElementById("dd_catagory").focus();
                                                    return false;
                                                }   
                                                else
                                                {
                                                    if(document.getElementById("txt_day_in_hand").value=="")
                                                    {   
                                                        alert("Please enter day in hand!!");
                                                        document.getElementById("txt_day_in_hand").focus();
                                                        return false;
                                                    }   
                                                    else
                                                    {
                                                        if(document.getElementById("txt_adult").value=="")
                                                        {   
                                                            alert("Please enter total number of adults traveling!!");
                                                            document.getElementById("txt_adult").focus();
                                                            return false;
                                                        }  
                                                        else
                                                        {
                                                            if(document.getElementById("txt_chield").value=="")
                                                            {   
                                                                alert("Please enter total number of childrens traveling!!");
                                                                document.getElementById("txt_chield").focus();
                                                                return false;
                                                            }  
                                                            else
                                                            {
                                                                if(document.getElementById("txt_vehicle_type").value=="")
                                                                {       
                                                                    alert("Please enter type of vehicle!!");
                                                                    document.getElementById("txt_vehicle_type").focus();
                                                                    return false;
                                                                }  
                                                                else
                                                                {
                                                                    if(document.getElementById("txt_rooms_required").value=="")
                                                                    {       
                                                                        alert("Please enter number of rooms required!!");
                                                                        document.getElementById("txt_rooms_required").focus();
                                                                        return false;
                                                                    }   
                                                                    else
                                                                    {
                                                                        if(document.getElementById("dd_room_required").value=="Select Type of Rooms")
                                                                        {       
                                                                            alert("Please select type of rooms!!");
                                                                            document.getElementById("dd_room_required").focus();
                                                                            return false;
                                                                        }   
                                                                        else
                                                                        {
                                                                            if(document.getElementById("txt_other_preference").value=="")
                                                                            {       
                                                                                alert("Please enter other preference & service required!!");
                                                                                document.getElementById("txt_other_preference").focus();
                                                                                return false;
                                                                            }   
                                                                            else
                                                                            {
                                                                                if(document.getElementById("txt_enquiry").value=="")
                                                                                {       
                                                                                    alert("Please enter enquiry!!");
                                                                                    document.getElementById("txt_enquiry").focus();
                                                                                    return false;
                                                                                }   
                                                                                else
                                                                                {
                                                                                    return true;
                                                                                }
                                                                            }
                                                                        }
                                                                    } 
                                                                }  
                                                            } 
                                                        }  
                                                    } 
                                                } 
                                            } 
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}