function launchwin(winurl,winname,toolbar,width,height,status,scrollbars,resizeable) {
	y = (screen.availHeight - height)/2;
	x = (screen.availWidth - width)/2;
	window.open(winurl,winname,'toolbar='+toolbar+',width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x+',status='+status+',scrollbars='+scrollbars+',resizeable='+resizeable+'');
}