Hi,
ohne geanau zu lesen, aber fehlt in der action nich ne klammer?
<form name="tester" action=ausloeser(event>
.............................................^
<input name="Query" size="20" maxlength="100" onkeydown="ausloeser(event)">
<input type="button" value="Buscar" onClick="parent.mainFrame.location.href='Search?SearchView&Query=' + this.form.Query.value">
</form>
Bye Ed X