第一种：
<!--startprint1-->
……打印的内容放在这里……
<!--endprint1-->
//打印
function preview(DivID) {
if (oper < ) {
bdhtml = window.document.body.innerHTML; //获取当前页的html代码
sprnstr = "<!--startprint" + oper + "-->"; //设置打印开始区域
eprnstr = "<!--endprint" + oper + "-->"; //设置打印结束区域
prnhtml = bdhtml.substring(bdhtml.indexOf(sprnstr) + ); //从开始代码向后取html prnhtml = prnhtml.substring(, prnhtml.indexOf(eprnstr)); //从结束代码向前取html
window.document.body.innerHTML = prnhtml;
window.print();
window.document.body.innerHTML = bdhtml;
}
else {
window.print();
} }
<input type="button" value="打印" id="btnPrint" onclick="preview('ex')" />
第二种
//打印
function preview(DivID) { var disp_setting = "toolbar=yes,location=no,";
disp_setting += "directories=yes,menubar=yes,";
disp_setting += "scrollbars=yes,width=985px";
var content_vlue = document.getElementById(DivID).innerHTML;
var docprint = window.open("", "", disp_setting);
docprint.document.open();
docprint.document.write('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"');
docprint.document.write('"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">');
docprint.document.write('<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">');
docprint.document.write('<head><title>My Title</title>');
docprint.document.write('<style type="text/css"> table.gridtable{font-family: verdana,arial,sans-serif;font-size: 14px;color: #123456; border-width: 1px;border-color: #123456;border-collapse: collapse; width: 985px;}');
docprint.document.write('table.gridtable th{border: 1px solid #666666;padding: 8px;background-color: #dedede;text-align: center;}');
docprint.document.write('table.gridtable td{border: 1px solid #666666;padding: 8px;color: #123455;font-size: 13px;height: 10px;background-color: #ffffff;text-align: center;}');
docprint.document.write('table.gridtable th{border: 1px solid #666666;padding: 8px;background-color: #dedede;text-align: center;}');
docprint.document.write('#JXFX div h1{background-color: #D1D1D1;width: 35%;letter-spacing: 2.5px;}');
docprint.document.write('#JXFX #getMonthWeek{width: 130px;text-align: center;float: right;}');
docprint.document.write('</style>');
docprint.document.write('</head><body onLoad="self.print()"><center>');
docprint.document.write(content_vlue);
docprint.document.write('</center></body></html>');
docprint.document.close();
docprint.focus(); }
这个可以自己设置样式，直接拼接起你想要的样式就可以了
<input type="button" value="打印" id="btnPrint" onclick="preview('ex')" />