function checkUploadFile(mode, varValue)
{
	var extension = varValue.substr((varValue.length-3), varValue.length);
	extension=extension.toLowerCase();
	if (mode=='document')
	{
		if(extension=='txt' || extension=='doc' || extension=='wri' || extension=='pdf' || extension=='rtf' || extension=='mcw' || extension=='wps')
			return 0;
		else
			return 1;
	} else if (mode=='picture')
	{
		if(extension=='jpg' || extension=='gif' || extension=='bmp')
			return 0;
		else
			return 1;
	} else if (mode=='movie')
	{
		if(extension=='avi' || extension=='mpg' || extension=='asf' || extension=='.rm')
			return 0;
		else
			return 1;
	}
	return 1;
}

var win = null;
function openWindow(mypage,myname,w,h,scroll){
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',';
	win = window.open(mypage,myname,settings)
}