function chk_upload() {
	var f  = document.upload;
	if(f.file1.value=="") { 
		alert("no file selected!");
		return false;
	}
	document.getElementById('uploadingIMG').style.visibility = 'visible';
	document.getElementById('BTN').style.visibility = 'hidden';
		document.all.uploadingIMG.style.visibility = 'visible';
	document.all.BTN.style.visibility = 'hidden';
	
		/*newwindow=window.open('delay.php','Upload Delay System','height=50,width=250');
	if (window.focus) {newwindow.focus()}*/
	
	return true;
}