Open Asp File With Confirm

How I can open asp file when I click on image after answering the confirm?here is my code:

<img src="delete.gif" border="0" onClick=" if (confirmSubmit()){ <a href='test.asp'>;}" >

<script LANGUAGE="JavaScript">

function confirmSubmit()
{
var agree=confirm("Do you want delete this item ?");
if (agree)
return true ;
else
return false ;
}

</script>