function popup(theURL, winName, winWidth, winHeight, features)
{
	if (winWidth > (screen.width-100)) {
		winWidth = screen.width-100;
	}
	if (winHeight > (screen.height-100)) {
		winHeight = screen.height-100;
	}

	var w = (screen.width - winWidth)/2;
	var h = (screen.height - winHeight)/2 - 100;
	var features = features+',width='+winWidth+',height='+winHeight+',top='+h+',left='+w;

	_popup = window.open(theURL, winName, features);
	_popup.focus();
	return false;
}

function techPopup(theURL)
{
	var winName = '';
	var winWidth = 640;
	var winHeight = 600;
	var features = 'resizable';

	return popup(theURL, winName, winWidth, winHeight, features);
}