function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}


if (document.images) {

nav1_on = new Image();
nav1_on.src = "http://www.uvacres.org/beta/i/nav1_on.gif";

nav2_on = new Image();
nav2_on.src = "http://www.uvacres.org/beta/i/nav2_on.gif";

nav3_on = new Image();
nav3_on.src = "http://www.uvacres.org/beta/i/nav3_on.gif";

nav4_on = new Image();
nav4_on.src = "http://www.uvacres.org/beta/i/nav4_on.gif";

nav5_on = new Image();
nav5_on.src = "http://www.uvacres.org/beta/i/nav5_on.gif";

nav6_on = new Image();
nav6_on.src = "http://www.uvacres.org/beta/i/nav6_on.gif";

nav7_on = new Image();
nav7_on.src = "http://www.uvacres.org/beta/i/nav7_on.gif";

nav8_on = new Image();
nav8_on.src = "http://www.uvacres.org/beta/i/nav8_on.gif";


nav1 = new Image();
nav1.src = "http://www.uvacres.org/beta/i/nav1.gif";

nav2 = new Image();
nav2.src = "http://www.uvacres.org/beta/i/nav2.gif";

nav3 = new Image();
nav3.src = "http://www.uvacres.org/beta/i/nav3.gif";

nav4 = new Image();
nav4.src = "http://www.uvacres.org/beta/i/nav4.gif";

nav5 = new Image();
nav5.src = "http://www.uvacres.org/beta/i/nav5.gif";

nav6 = new Image();
nav6.src = "http://www.uvacres.org/beta/i/nav6.gif";

nav7 = new Image();
nav7.src = "http://www.uvacres.org/beta/i/nav7.gif";

nav8 = new Image();
nav8.src = "http://www.uvacres.org/beta/i/nav8.gif";

}

function swapOn(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "_on.src");
  }
}

function swapOff(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + ".src");
  }
}


function popIt(theURL,winName,features){
   window.open(theURL,winName,features);
}

function openModule(url){
   window.open(url,'Module','width=600,height=240'); 

}


function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}


function validateContactForm(theForm)
{	
	
	if (!validRequired(theForm.name,"Name")){
		return false;
        }

	if (!validRequired(theForm.message,"Message")){
		return false;
        }

	if (!validEmail(theForm.email,"Email Address",true)){
		return false;
        }

	return true;
}