Problem With Select Option

[anamika123]

Hi all,
i am developing simple site for php where i put onle selct box,I have to check the value from the select box and put it in the database.I am having problem that if a value is alrady selectd , if you want to select it agin i have to prompt up the message that value is already selected.Please help me
thank you

[phparion]

you can use ajax call for SELECT OnChange event, call a php page that checks if the currently selected value is already present in the table if it is then show simple javascript alert in the ResponseHandling of the call.