// Preload switched images.
var norm = new Array();
// norm[0] is the top graphic.
norm[1] = new Image; norm[1].src = "navstuff/but0101.gif";
norm[2] = new Image; norm[2].src = "navstuff/but0201.gif";
norm[3] = new Image; norm[3].src = "navstuff/but0301.gif";
norm[4] = new Image; norm[4].src = "navstuff/but0401.gif";
norm[5] = new Image; norm[5].src = "navstuff/but0501.gif";
norm[6] = new Image; norm[6].src = "navstuff/but0601.gif";
norm[7] = new Image; norm[7].src = "navstuff/but0701.gif";

var over = new Array();
// over[0] is the top graphic.
over[1] = new Image; over[1].src = "navstuff/but0102.gif";
over[2] = new Image; over[2].src = "navstuff/but0202.gif";
over[3] = new Image; over[3].src = "navstuff/but0302.gif";
over[4] = new Image; over[4].src = "navstuff/but0402.gif";
over[5] = new Image; over[5].src = "navstuff/but0502.gif";
over[6] = new Image; over[6].src = "navstuff/but0602.gif";
over[7] = new Image; over[7].src = "navstuff/but0702.gif";

var down = new Array();
// down[0] is the top graphic.
down[1] = new Image; down[1].src = "navstuff/but0103.gif";
down[2] = new Image; down[2].src = "navstuff/but0203.gif";
down[3] = new Image; down[3].src = "navstuff/but0303.gif";
down[4] = new Image; down[4].src = "navstuff/but0403.gif";
down[5] = new Image; down[5].src = "navstuff/but0503.gif";
down[6] = new Image; down[6].src = "navstuff/but0603.gif";
down[7] = new Image; down[7].src = "navstuff/but0703.gif";

url = new Array();
url[0] = "";
url[1] = "index.html";
url[2] = "aboutus.htm";
url[3] = "mailform.htm";
url[4] = "privinfo.htm";
url[5] = "irrigate.htm";
url[6] = "gallery.htm";
url[7] = "netlinks.htm";
url[8] = "";

var ion = 1;

// function for onmouseover
function newImg(i) {if (i!=ion)
{document.images[i].src = over[i].src;}}

// function for onmouseout
function oldImg(i) {if (i!=ion)
{document.images[i].src = norm[i].src;}}

// function to set navigation buttons to displayed page.
function setNav(i) {if (i!=ion)
{document.images[ion].src = norm[ion].src;
document.images[i].src = down[i].src; ion = i; }}

// function to load a new page from the top menu.
function newPage(page) {if (page!=ion)
{window.location = url[page]; return false;}}

function isEmail(elmt)
{if (elmt.value.indexOf("@") != "-1" && elmt.value.indexOf(".") != "-1")
{return true;} else {return false;}}

function isFilled(elmt)
{if (elmt.value == "" || elmt.value == null)
{return false;}
else
{return true;}}

function isComplete(form) 
{if (isFilled(form.myname)==false) {alert("Please include your name on the form."); form.myname.focus(); return false;}
if (isEmail(form.emailad)==false) {alert("Please include a valid email address on the form."); form.emailad.focus(); return false;}
if (isFilled(form.message)==false) {alert("Please include a message on the form."); form.message.focus(); return false;}
return true;}