Embedded php in javascript

Hi, I am trying to create a pop up alert warning for deleting an entry in my database. What I have is: <form name=myform> <input type=button value="Delete Venue" onClick="if(confirm('Are you sure you want to delete ID # <? echo "$UID"; ?>? There is no undo.')) {alert('Value deleted<? mysql_query("DELETE from table where ID = '$UID'"); ?>')} else {alert('no changes')}"> </form> The problem here is that the embedded php is run regardless of if the user clicks no, for example if i put php in both the if and the else they will both be executed. So does anyone have and idea how to make this work or another workaround?