function email_mask(prefix,suffix,optional_text) {

	//usage: 
	//prefix = the prefix for the email address 
	//suffix = the part after the @
	//text = text to show on the browser for the user to click on
	//NOTE: supply "false" as the text and the system will display the email address instead
	//	or - supply a valid <img> tag to pull in an image.
	
  var address = "";
  address += prefix;
	address += "@";
	address += suffix;

  document.write('<a href="mailto:');
  document.write(address.toLowerCase());
  document.write('">');
	if(optional_text == "false"){	
	    document.write(address.toLowerCase());
	}else{
	    document.write(optional_text);
	}
	document.writeln('</a>');
	
	return true;
}