function popup_window(url,width,height){var left=parseInt((screen.width-width)/2)
height=screen.height/100*70
var top=parseInt((screen.height-height)/2)
var params='status=no,resizable=no,location=no,scrollbars=yes,toolbar=no,menubar=no,width='+width+',height='+height+',left='+left+',top='+top
var popupwindow=window.open(url,'name',params)
if(window.focus){popupwindow.focus()}}
function confirm_action(confirm_text){var agree=confirm(confirm_text)
if(agree)
return true
else
return false}