function with css code for active button

[newphpbees]

Hi..

I don't know if my idea is possible and if how can I do that.

I have functions for button onclick.

I have 3 buttons and I want to change the color of my button if it is active

here is my code


<script type="text/javascript">
//=========display parameter settings==========//
function display_PS(){
document.loading_kanban.action="ParameterSettings.php";
document.loading_kanban.submit();
}
//=======display kanban=========//
function display_Kanban(){
document.loading_kanban.action="kanban_report.php";
document.loading_kanban.submit();
}
//=========display SR==========//
function display_SR){
document.loading_kanban.action="StockRequisition.php";
document.loading_kanban.submit();
}
</script>
<div id="main_button">
<input type="button" name="parameter_settings" value="Parameter Settings" onclick="display_PS()">
<input type="button" name="parameter_settings" value="Stock Requisition" onclick="display_SR()">
<input type="button" name="parameter_settings" value="Kanban Report" onclick="display_Kanban()">
</div>


Is it possible to add code in my function for css active button..If no what should I do to change the color of my button for the client to know what page she is.

Thank you