var what_off = new Image();
what_off.src = 'images/nav_what_off.gif';
var what_on = new Image();
what_on.src = 'images/nav_what_on.gif';

var wksp_off = new Image();
wksp_off.src = 'images/nav_wksp_off.gif';
var wksp_on = new Image();
wksp_on.src = 'images/nav_wksp_on.gif';

var clients_off = new Image();
clients_off.src = 'images/nav_clients_off.gif';
var clients_on = new Image();
clients_on.src = 'images/nav_clients_on.gif';

var news_off = new Image();
news_off.src = 'images/nav_news_off.gif';
var news_on = new Image();
news_on.src = 'images/nav_news_on.gif';

var tips_off = new Image();
tips_off.src = 'images/nav_tips_off.gif';
var tips_on = new Image();
tips_on.src = 'images/nav_tips_on.gif';

var contact_off = new Image();
contact_off.src = 'images/nav_contact_off.gif';
var contact_on = new Image();
contact_on.src = 'images/nav_contact_on.gif';




function newsletter(){
	window.open("news_signup.html","signup","width=610,height=470,status=1,scrollbars=0")
}


  
function rollOn(imgname) {
	if (imgname == "") {
		return;	
	}
	if (document.images) {
  	document.images[imgname].src = eval(imgname + '_on.src');
  } 
}
    
function rollOff(imgname) {
	if (imgname == "") {
		return;	
	}
	if (document.images) {
  	document.images[imgname].src = eval(imgname + '_off.src');
  } 
}


function contactForm(form) {
		if (!document.forms["contactus"].first.value){
			alert("You must supply your first name.");
			document.forms["contactus"].first.focus();
			return;
		}	
		if (!document.forms["contactus"].last.value){
			alert("You must supply your last name.");
			document.forms["contactus"].last.focus();
			return;
		}	
		if (!document.forms["contactus"].company.value){
			alert("You must supply your company name.");
			document.forms["contactus"].company.focus();
			return;
		}	
		if (!isEmail(document.forms["contactus"].email.value)){
			alert("You must supply a valid email address.");
			document.forms["contactus"].email.focus();
			return;	
		}
		if (!checkPhone(document.forms["contactus"].phone)){
			alert("You must supply a valid phone number.");
			document.forms["contactus"].phone.focus();
			return;
		}else{
			document.forms["contactus"].action = "cgi/contact.cgi";
			document.forms["contactus"].submit();
		}
}

function signupForm(form) {
		if (!isEmail(document.forms["signup"].email.value)){
			alert("You must supply a valid email address.");
			document.forms["signup"].email.focus();
			return;	
		}else{
			document.forms["signup"].action = "cgi/signup.cgi";
			document.forms["signup"].submit();
		}
}

function resetForm(which) {
	form = eval('document.' + which);
	for(i=0;i<form.elements.length;i++) {
		if (form.elements[i].value != "") {
			form.elements[i].value = "";
		}
	}
}