How to submit a selected value without a submit button? [closed]

Question

I have this code

<Select>
<option value="-1">Select</option>
<option value="6">kasper </option> 
<option value="13">adad </option> 
<option value="14">3204 </option>                   
</select>

I am using this button to submit the selected choice of the user:

<input type="submit" name="pageaction" value="Select" />

When the user click on "Select" it will display information corresponding to his select.

Can it be without the button?

Regards to all,

Answer 1

You can call function inside the select dropdown.

 <select id="sel_id" name="sel_name"  onchange="this.form.submit();">
<option value="-1">Select</option>
<option value="6">kasper </option> 
<option value="13">adad </option> 
<option value="14">3204 </option>                   
</select>