问TCPDF进度条

EN

$i = 1;
while($i< PDF_PAGE_COUNT){
        ob_start();
        pdf_create_page($i);
        echo $i/PDF_PAGE_COUNT;
        ob_flush();
        flush();
$i++;
}

$(document).ready(function(){
 $("#PDF").click(function(){
		/*-------------- validate filters	-------------------------------*/
		if(!(validarFecha(fecha_ymd(rj.Get('#TxtFechaIni').value())))){Warn2.show();return false; }
		if(!(validarFecha(fecha_ymd(rj.Get('#TxtFechaFin').value())))){Warn3.show();return false; }	
		if(Date.parse(fecha_ymd(rj.Get('#TxtFechaIni').value()))>=Date.parse(fecha_ymd(rj.Get('#TxtFechaFin').value()))){Warn.show();return false; }
	/* is alll right */	
	else {		
				/* show a message while generating report*/
				WinSnd.Message({type:'info', title:'generating report', value:'Please, wait ...', buttons:' '}).show();	
				/* url with params to send */
				var url="report.php?&slash="+'<?php echo(isset($_POST['slash'])?@$_POST['slash']:@$_GET['slash']);?>'+"&module="+'<?php echo (isset($_POST['module'])?@$_POST['module']:@$_GET['module']);?>'
				+"&TxtCheck=excel"
				+"&TxtFechaIni="+rj.Get('#TxtFechaIni').value()
				+"&TxtFechaFin="+rj.Get('#TxtFechaFin').value()
				+"&LkpTdoc="+rj.Get('#LkpTdoc').value();

				var filename = <?php echo '"'.$gSave.'"';?>; /* name for report, i set*/
				var xhr = new XMLHttpRequest();
				xhr.responseType = 'blob';
				
				xhr.onload = function(){
						WinSnd.hide(); /* hide message */
						var a = document.createElement('a');
						a.href = window.URL.createObjectURL(xhr.response); // xhr.response es un blob file
						a.target = '_blank';
						a.download = filename; // file name 
						a.style.display = 'none';
						document.body.appendChild(a);
						a.click(); // action
						delete a; //
				};
				xhr.open('GET', url);
				xhr.send();	
						
		}// fin validaciones
			
    });//fin function	
});// fin