if(screen){ 
topPos=0 
leftPos=0 
} 
function getPage(thePage,wt,ht){ 
leftPos= (screen.width-wt)/2 
topPos = (screen.height-ht)/2 
newwin3 = window.open(thePage,'','resizable=0, scrollbars=1, left='+leftPos+',top='+topPos+',width='+wt+',height='+ht) 
}