make phone call on button click

[manish khamar]

hello everybody.

I want to make one button and on this button click automatic make phone call on number which is display on button.

I try some demo but it's not working.
<code>

var frm=new Ext.form.FormPanel({
fullscreen:true,
scroll: 'vertical',
items: [
{
html:'<a href="tel:1-408-555-5555">Call</a>'


}]

});

</code>
so please help me :(

[manish khamar]

I don't get any reply still.
please help me.
:-?