window.onload=init;

function init() {
	var newsletterDiv = "plc_lt_contentArea_PagePlaceholder_PagePlaceholder_lt_zoneRightColumn1_SenSoftNewsletterSubscription_txtEmail";
	document.getElementById(newsletterDiv).value="YOUR EMAIL ADDRESS";
	document.getElementById(newsletterDiv).addEventListener('focus', resetValue(), false);
}

function resetValue() {
	//field.value='';
	//alert('hello');
}