//opens external links in a child window
function openExtLink(url) 
{
	var childWindow;
    childWindow = window.open (url,'mywindow','width=600,height=400,scrollbars=1,resizable=1,menubar=1,toolbar=1,status=1,location=1');
    if (window.focus) 
    {
    	childWindow.focus();
    }
}