delete pm url

[ragtek]

this is at moment my code:

[html]<div class="bd">
<phrase 1="$newpm[username]" 2="$newpm[title]">$vbphrase[newmp_x_y]</phrase>
<br />Inhalt: $pminhalt
<br /><span style="float:right;">
<a href="private.php?do=managepm&dowhat=delete&pm=$ne wpm[pmid]">delete</a></span><a href="$pmpopupurl" target="_blank">show pm</a> <br /></div>[/code]

whats wrong with the delete part?
and how can i built in an confirm dialog, if the user is sure that he wants to delete it?