i have two combobox both combobox have value
first combobox like categeory
first combobox value have :- like computer and IT
and second combobox value have:- it’s sub categeory
like
software and hardware
Adminstrater and finance
if user select first combobox value computer then automatic set in second combobox value software and hardware
please assist me
This is called a cascading combo box.
You need to employ a mix of php, mysql and javascript to get this working nicely (you can omit the javascript if your hapy for the page to reload inbetween cascades)
Use the first combo boxes onChange event to call a query to the database to extract the second combobox’s options.
There are many examples on teh net, just google ‘cascading comboboxes’
You would want to use Javascript and perhaps a switch…
var category=document.getElementById(“thefirstcombobox”).value;
if (category) {
switch(category) {
case “something”: document.getElementById(“something”).value=“change the value”; break;
case “somethingelse”: document.getElementById(“somethingelse”).value=“change the value 2”; break;
}
}
I hope this makes sense 
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