<block id="printarea">

</bock>

   $('#printdo').bind('click',function (data) {
               var printpage=document.getElementById('printarea');

                newstr= printpage.innerHTML;
                var oldstr = document.body.innerHTML;
                document.body.innerHTML =newstr;
               window.print();
                document.body.innerHTML=oldstr;
                //打印完刷新当前页面
                location.reload();
                //window.print();
            })

$("body").css("height", "95%");