function say_gecko_popblock()
{
	var msg = "";
	if (thisBrowser == "ns7" || thisBrowser == "moz")
	{
		msg += "<p>You are using: ";
	
		if (thisBrowser == "ns7")
			msg += "<big><b>Netscape 7</b></big> ";
		else // Mozilla
			msg += "<big><b>Mozilla</b></big> ";
	
	
	if (document.location.href.indexOf("file://") != -1)
		msg +=
	
	"with a <b>downloaded copy</b> of Protein Explorer. This browser has no \
	mechanism to permit specific disk files to open popups, so you must \
	completely disable the popup blocker in order for Protein Explorer to work: \
	<ul> \
	Edit, Preferences, Privacy and Security, Popup Windows, \
	uncheck \"Block unrequested popup windows\". Then click OK, \
	and click Reload. </ul>\
	\
	If you prefer to use the browser's popup blocker, we highly recommend that \
	you use the new <a href='http://www.getfirefox.com' target='ffwin'>Firefox</a> \
	browser, because its \
	popup blocker is easily set to allow downloaded files to open new windows, \
	while blocking on-line popups. \
	";

	else // on-line
		msg += 
"which includes a pop-up blocker. To enable Protein Explorer to work: \
	<ul> \
	<li>Tools, Popup Manager, Allow Popups from This Site. \
	<li>This opens the Allowed Web Sites dialog. Click Add, OK. \
	<li>Backup, then try starting Protein Explorer again. \
	</ul>";
	
	}
	
	if (thisBrowser == "ff")
	{
		msg += "<p>You are using <big><b>Firefox</b></big>. ";
	
//	if (false) // document.location.href.indexOf("file://") != -1)
		msg +=
	
//	"with a <b>downloaded copy</b> of Protein Explorer. \
	"If Firefox is blocking popups for downloaded files, a yellow bar should \
	be visible just above this white document that says <i>Firefox \
	prevented this site from opening a popup window. Click here for options ...</i> \
	\
	<ul> \
	Click on <i>Click here for options ...</i>, then click on \
	<b>Allow popups for</b>. Now, go Back, \
	and then try starting Protein Explorer again. \
	</ul>\
	";
	
	}

	return (msg);
}