Javascript: open new page in same window

<script type="text/javascript">
window.open ('YourNewPage.htm','_self',false)
</script>

see reference: http://www.w3schools.com/jsref/met_win_open.asp

try this it worked for me in ie 7 and ie 8

 $(this).click(function (j) {
            var href = ($(this).attr('href'));
            window.location = href;
            return true;

The second parameter of window.open() is a string representing the name of the target window.

Set it to: "_self".

<a href="javascript:q=(document.location.href);void(open('http://example.com/submit.php?url='+escape(q),'_self','resizable,location,menubar,toolbar,scrollbars,status'));">click here</a>

Sidenote: The following question gives an overview of an arguably better way to bind event handlers to HTML links.

What's the best way to replace links with js functions?

<a href="javascript:;" onclick="window.location = 'http://example.com/submit.php?url=' + escape(document.location.href);'">Go</a>;