javascript - Automatically post form with onclick event -

there page shows button , needs user action able event handlers.

the page handles of variables , processing values:

$returnstring .= '<form action="" method="post">'; $returnstring .= '<input type="hidden" name="cost" value='.$cost.' />'; $returnstring .= '<input type="hidden" name="page" value='.$pageid.' />'; $confirm_purchase = esc_attr(get_option('my_confirm_purchase')); $returnstring .= '<input type="submit" name="submit" value="purchase"  onclick="return confirm(\''.$confirm_purchase.'\')" />'; $returnstring .= '</form>'; 

i need process form automatically. tried window.onload , auto submit referring form id, did not work.

the page submitting form automatically , need change onclick event automatically, too.

is there way can handle issue? how can change structure without using form ?

maybe use jquery , try this:

$('<form method="post"><input id="test" value="3"></form>').submit(); 

encapsulate $returnstring this:

$finalstring = "$(".$returnstring.").submit();" 

this rendered javascript has executed after dom ready:

$(document).ready(function(){     //your code }); 

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.submit() automatically submits html-form upon execution. test if works, used in older intranet applications , worked.