function ChangeImage(id, src)
  { 
    document.getElementById(id).src=src;
	return 1; 
  } 

function preload($url)
{
	$img = new Image;
	$img.src=$url;
}
preload("i/btn_about_on.gif");
preload("i/btn_mi_on.gif");
preload("i/btn_membership_on.gif");
preload("i/btn_meetings_on.gif");
preload("i/btn_publications_on.gif");
preload("i/btn_news_on.gif");
preload("i/btn_res_on.gif");

function show($obj, $url)
{
	$obj.src=$url;
}


<!-- Date Script
function GetDay(nDay)
{
	var Days = new Array("Sunday","Monday","Tuesday","Wednesday",
	                     "Thursday","Friday","Saturday");
	return Days[nDay]
}

function GetMonth(nMonth)
{
	var Months = new Array("January","February","March","April","May","June",
	                       "July","August","September","October","November","December");
	return Months[nMonth] 	  	 
}

function DateString()
{
	var Today = new Date();
	var suffix = "th";
	switch (Today.getDate())
	{
		case 1:
		case 21:
		case 31: 
			suffix = "st"; break;
		case 2:
		case 22:
			suffix = "nd"; break;
		case 3:
		case 23:
			suffix = "rd"; break;
	};

	var strDate = GetMonth(Today.getMonth()) + " "  + Today.getDate() + ", " + Today.getFullYear();
	return strDate
}
// End Date Script -->


<!-- Rotating Did You Know
var text = 0;

var message=new Array();
  message[0] = "Mosquito species preferring to breed around the house, like the Asian Tiger Mosquito, have limited flight ranges of about 300 feet.  Most species have flight ranges of 1-3 miles."
  message[1] = "Smaller species of mosquitoes found around houses commonly weigh about 2.5 milligrams.  The largest species weigh in at a whopping 10 milligrams."
  message[2] = "Female mosquitoes imbibe blood so that their eggs can mature prior to laying.  It serves no nourishment function.  Males do not take blood meals at all."
  message[3] = "In order to obtain energy, both male and female mosquitoes feed upon plant nectars – much in the same manner as honeybees."
  message[4] = "Most adult female mosquitoes live 2-3 weeks, during which time they can feed 4 or 5 times, laying eggs after each meal.  Some species that over winter in garages, culverts and attics can live as long as 6 months."
  message[5] = "The progeny produced by one female, based upon egg-laying of 450 eggs per an average of 3 batches per lifetime will reach 49,843,353,164 by the 4th generation (8-16 weeks) based upon a 70% survival."
  message[6] = "Asian Tiger Mosquitoes have been found breeding in treeholes over 40 feet above ground. "
  message[7] = "Mosquitoes have been found breeding up to 14,000 feet in the Himalayas and 2000 feet underground in mines in India."
  message[8] = "At least 62 species of mosquitoes have been found infected with the West Nile virus in the United States.  Not all of these, however, are capable of maintaining the virus in such a manner as to permit them to transmit it among organisms."
  message[9] = "West Virginia has the fewest species (24) of mosquitoes, while Texas has the most species (82)."  
  message[10] = "Black is the most attractive color to mosquitoes, followed closely by red. Greys and blues have neutral attractancy.  Khaki, green, light khaki, and yellow are not attractive, with white being the least attractive color to mosquitoes."
  message[11] = "According to some scientists, mosquitoes are known from as far back as the Triassic Period – 400 million years ago. They are known from North America from the Cretaceous – 100 million years ago."
  message[12] = "There are about 2,700 species of mosquito. There are 176 species in the United States."
  message[13] = "The average mosquito takes in about 5-millionths of a liter of blood during feeding."
  message[14] = "Mosquitoes find hosts by sight (they observe movement); by detecting infra-red radiation emitted by warm bodies; and by chemical signals (mosquitoes are attracted to carbon dioxide and lactic acid, among other chemicals) at distances of 25 to 35 meters."
  message[15] = "Mosquitoes fly an estimated 1 to 1.5 miles per hour."
  message[15] = "Salt marsh mosquitoes can migrate up to 40 miles for a meal."
  message[16] = "Bigger people are often more attractive to mosquitoes because they are larger targets and they produce more mosquito attractants, namely CO2 and lactic acid."
  message[17] = "Women are usually more attractive to mosquitoes than men because of the difference in hormones produced by the sexes."
  message[18] = "Blondes tend to be more attractive to mosquitoes than brunettes."
  message[19] = "Movement increased mosquito biting up to 50% in some research tests."
  message[20] = "A full moon increased mosquito activity 500% in one study."


function changeText() {
  if (message.length > 0) {
    document.change.descript.value=message[text];
    text++;
  }
  if (text == 20) {text = 0; }  // change the # 4 at the left to the maximum # of message lines you want included
    window.setTimeout("changeText()", 3500); }  // change the # on the left to adjust the speed of the
                                               // scroll. The smaller the # the faster the speed

// Multiple onload function created by: Simon Willison
// http://simon.incutio.com/archive/2004/05/26/addLoadEvent
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function() {
  changeText();
});

// End Did You Know  -->