HTML code of this form:

<form action="http://www.webmoney.eu/merchant/PayTask.mvc/Execute" method="post">
<input id="PM_PAYMERCH_ID" type="hidden" name="PM_PAYMERCH_ID" value="41" />
<input id="PM_PAYMENT_NO" type="hidden" name="PM_PAYMENT_NO" value="1" />
<input id="PM_PAYTEST_MODE" type="hidden" name="PM_PAYTEST_MODE" value="0" />
Sum to pay: <input id="PM_PAYMENT_AMOUNT" name="PM_PAYMENT_AMOUNT" value="1.00" type="text" /><br>
E-cash type: <input id="PM_PAYMENT_ATYPE" name="PM_PAYMENT_ATYPE" value="EUR.TST0" type="text" />
<input type="submit" value="Pay" /><br> </form>