function openwin(url,h,w){
var width=Math.round((window.screen.width-w)/2);
var height=Math.round((window.screen.height-h)/2);
window.open(''+url+'', 'newwindow', 'height='+h+', width='+w+', top='+height+',left='+width+',toolbar=no, menubar=no, scrollbars=no, resizable=yes,location=no, status=no')
}