/* resizes columns to same size */
onload=function() {
	var divr = document.getElementById('body').offsetHeight;
	var divl = document.getElementById('navigation').offsetHeight;
	if(divl >= divr) {
	document.getElementById('body').style.height = divl +"px";
	}
}

/* subscribe form elements */
function nameEmpty() {
	if(document.subscribe.newsletter_name.value=='Your name') {document.subscribe.newsletter_name.value = ''}
}
function nameFill() {
	if(document.subscribe.newsletter_name.value==''){document.subscribe.newsletter_name.value='Your name'}
}
function emailEmpty() {
	if(document.subscribe.newsletter_email.value=='Your email address') {document.subscribe.newsletter_email.value = ''}
}
function emailFill() {
	if(document.subscribe.newsletter_email.value==''){document.subscribe.newsletter_email.value='Your email address'}
}

/* advice form elements */
function nameClear() {
	if(document.advice.advice_name.value=='Enter Your Name Here') {document.advice.advice_name.value = ''}
}
function nameReplace() {
	if(document.advice.advice_name.value==''){document.advice.advice_name.value='Enter Your Name Here'}
}
function emailClear() {
	if(document.advice.advice_email.value=='Enter Your Email Here') {document.advice.advice_email.value = ''}
}
function emailReplace() {
	if(document.advice.advice_email.value==''){document.advice.advice_email.value='Enter Your Email Here'}
}
function telClear() {
	if(document.advice.advice_tel.value=='Enter Your Contact Phone Number') {document.advice.advice_tel.value = ''}
}
function telReplace() {
	if(document.advice.advice_tel.value==''){document.advice.advice_tel.value='Enter Your Contact Phone Number'}
}

/* email address validation */
function validate(form_id,email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      alert('Please enter your email address.');
      return false;
   }
}