function print_preview() {
var inf = document.getElementById('enhance3').innerHTML;
var title = document.getElementById('enhance3Middle').innerHTML;
len = document.styleSheets.length;
var str = '' + title + '';
str += '' + inf + '';
win = window.open("", "newwin","height=500,width=700,status=yes,toolbar=no,menubar=no,location=no,resizable=no,scrollbars=yes");
win.document.write(str);
win.document.close();
}