function popwin(url,wdt,hgt) {
	w=screen.width;
	h=screen.height;
	leftm=(w-wdt)/2;
	topm=(h-hgt)/2;
	window.open(url,'new','left='+leftm+',top='+topm+',width='+wdt+',height='+hgt+',menubar=no,scrollbars=yes');
}

function popwinr(url,wdt,hgt) {
	w=screen.width;
	h=screen.height;
	leftm=(w-wdt)/2;
	topm=(h-hgt)/2;
	window.open(url,'new','left='+leftm+',top='+topm+',width='+wdt+',height='+hgt+',menubar=no,scrollbars=yes,resizable=yes');
}

function popwin_noscroll(url,wdt,hgt) {
	w=screen.width;
	h=screen.height;
	leftm=(w-wdt)/2;
	topm=(h-hgt)/2;
	window.open(url,'new','left='+leftm+',top='+topm+',width='+wdt+',height='+hgt+',menubar=no,scrollbars=no').focus();
}