How to Set Blank Value in SELECT OPTION DROPDOWN

Simple...

add disabled selected value to your blank OPTION <select name="tdseat" id="tdseat"> <option disabled selected value>---- 0 ----</option> <option value="1">1 Seat</option> <option value="2">2 Seats</option> <option value="3">3 Seats</option> <option value="4">4 Seats</option> <option value="5">5 Seats</option> <option value="6">6 Seats</option> </select>