多种打印方式

<input class="Noprn" type="button" onclick="window.print()" value="打印"/>
  <input type="button" name="print" value="预览并打印" onclick="preview()"/>
  <input type="button" ;
  prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);
  prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));
  window.document.body.innerHTML=prnhtml;
  window.print();
}
</script>