function getPage(thePage,wt,ht){ 
wt = wt +20
ht = ht +30
leftPos = (screen.width-wt)/2 
topPos = (screen.height-ht-60)/2 
newWin1 = window.open(thePage,'_blank','toolbars=no,resizable=yes,scrollbars=no,left='+leftPos+',top='+topPos+',width='+wt+',height='+ht) 

}