function doPrint() 
{    
    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();    
}