//js部分
function?printTab(){			bdhtml=window.document.body.innerHTML;????	????????sprnstr="<!--startprint-->";????	????????eprnstr="<!--endprint-->";????	????????prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);????	????????prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));????	????????window.document.body.innerHTML=prnhtml;?	????????window.print();?		}
//html部分
<!--startprint-->?
//打印的部分
<!--endprint-->