page break when printing

Page breaks between the content. I have so many vouchers to print. I need one voucher in one page with page break. I have developed  like, i have placed the content in a div which has height and width as A4 size.

"<div style='height:900px;border:0px solid #000000'> " .So i got vocuhers as page wise



My code is


  function getdataforprinting(val){
  
   
        xmlhttp = false;
        if (window.XMLHttpRequest) {// code for Firefox, Opera, IE7, etc.
            xmlhttp=new XMLHttpRequest();
        } else if (window.ActiveXObject) {// code for IE6, IE5
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
        /* ========== AJAX Initializtion ========== */

        if (xmlhttp!=null) {
            url="/getdataforedit"+"?ion="+ion;

            xmlhttp.onreadystatechange= function () { getprint(xmlhttp); };
            xmlhttp.open("POST", url, true);
            xmlhttp.setRequestHeader("Cache-Control","no-cache, private, max-age=0");
            xmlhttp.send(null);

        } else {
            alert("Your browser does not support XMLHTTP.");
        }
    }

    function getprint(httpRequest1)
    {
   
        if(httpRequest1.readyState==4)
        {
    
            if(httpRequest1.status==200)
            {
            
                var rest="";
                var result = httpRequest1.responseXML;
               var suplength=result.getElementsByTagName("supplier").length;
               if(suplength>0)
                   {
                       var msg=result.getElementsByTagName("supplier");
                       for(var t=0;t<suplength;t++)
                           {
                              var suppname=result.getElementsByTagName("suppname")[t].childNodes[0].nodeValue;
                              var billdate=result.getElementsByTagName("billdate")[t].childNodes[0].nodeValue;
                              var paymode=result.getElementsByTagName("paymode")[t].childNodes[0].nodeValue;
                               var ionno=result.getElementsByTagName("ionno")[t].childNodes[0].nodeValue;
                               var bbrcode=result.getElementsByTagName("bbrcode")[t].childNodes[0].nodeValue;
                                var instno=result.getElementsByTagName("instno")[t].childNodes[0].nodeValue;
                                  var instdate=result.getElementsByTagName("instdate")[t].childNodes[0].nodeValue;
                                var billno=result.getElementsByTagName("billno")[t].childNodes[0].nodeValue;
                                 var billamount=result.getElementsByTagName("billamount")[t].childNodes[0].nodeValue;
                                  var amount=result.getElementsByTagName("payamt")[t].childNodes[0].nodeValue;
                                  var suppid=result.getElementsByTagName("suppid")[t].childNodes[0].nodeValue;
  
                      rest+="<div style='height:900px;border:0px solid #000000'>";

   rest+="<table cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"60%\"><tr>";
  rest+="<td class=\"text_bg\">Inter Office Document Number</td>";
   rest+="<td class=\"text_bg\">"+ionno+"</td>";
   rest+="</tr><tr><td class=\"text_bg\">Supplier payment voucher number</td>";
   rest+="<td class=\"text_bg\">"+suppid+"</td></tr>";
   rest+="<tr><td class=\"text_bg\">Supplier name</td>";
   rest+="<td class=\"text_bg\">"+suppname+"</td></tr><tr><td class=\"text_bg\">Supplier Bill date</td>";
   rest+="<td class=\"text_bg\">"+billdate+"</td></tr><tr><td class=\"text_bg\">Supplier Bill amount</td>";
   rest+="<td class=\"text_bg\">"+billamount+"</td></tr><tr><td class=\"text_bg\">Pay mode</td><td class=\"text_bg\">"+paymode+"</td>";

 
      rest+="</tr><tr><td class=\"text_bg\">Bank Name</td><td class=\"text_bg\">bnk</td></tr><tr>";
   rest+="<td class=\"text_bg\">Branch</td><td class=\"text_bg\">br</td></tr><tr>";
       rest+="<td class=\"text_bg\">Instrument Number</td>";
      rest+="<td class=\"text_bg\">"+instno+"</td></tr><tr><td class=\"text_bg\">Instrument Date</td>";
      rest+="<td class=\"text_bg\">"+instdate+"</td></tr> </table>";
   rest+="</div>";

                           }   //for close



    var disp_setting="toolbar=yes,location=no,directories=yes,menubar=yes,";
   disp_setting+="scrollbars=yes,width=650, height=600, left=100, top=25";

   var docprint= window.open("", "", disp_setting);
   docprint.document.open();
   docprint.document.write('<html>');
   docprint.document.write('<body onLoad="self.print()"><center>');

   docprint.document.write(rest);
   docprint.document.write('</center></body></html>');
   docprint.document.close();
   docprint.focus();
                }
        }


    }}