Function not working on onFocus but works in <a href... Why?

[StefanRSA]

I have a function:

<script type="text/javascript">
function viewcalendar() {
kalendarik = window.open("/member/php_calendar/calendar.php", "kalendarik" , "location=0, menubar=0, scrollbars=0, status=0, titlebar=0, toolbar=0, directories=0, resizable=1, width=200, height=240, top=50, left=250");
  kalendarik.resizeTo(200, 240);
  kalendarik.moveTo(250, 50);
}
</script>

I have a text field that is READONLY. Next to the field is a <a href to call the function and it is working correctly:

<input name="fname" id="fid" READONLY value="" type="text" ><a href="javascript:viewcalendar()"> Click Here</a>

 

I also want the onFocus to be called when a user click on the field but it is not working??? Why not?

<input name="fname" id="fid" READONLY value="" type="text" onClick="viewcalendar();"> 

[StefanRSA]

Anybody?