if(screen){
	topPos=0
	leftPos=0
}
function popup(thePage,wt,ht){
	leftPos=(screen.width-wt)/2
	topPos=(screen.height-ht)/2
	newWin1=window.open(thePage,'aWin','toolbars=no,resizeable=no,scrollbars=no,left='+leftPos+',top='+topPos+',width='+wt+',height='+ht)
}