// navigation mouse over/out support
function overNCSCNavButton(buttonId) {
	document.getElementById(buttonId).src = '/Images/header/nav.button.ncsc.mouseover.gif';
}

function outNCSCNavButton(buttonId) {
	document.getElementById(buttonId).src = '/Images/header/nav.button.ncsc.gif';
}

function overActiveNavButton(buttonId) {
	document.getElementById(buttonId).className = 'globalNavButton globalNavButtonInactive globalNavButtonLink';
}

function outActiveNavButton(buttonId) {
	document.getElementById(buttonId).className = 'globalNavButton globalNavButtonActive globalNavButtonLink';
}

function overInactiveNavButton(buttonId) {
	document.getElementById(buttonId).className = 'globalNavButton globalNavButtonActive globalNavButtonLink';
}

function outInactiveNavButton(buttonId) {
	document.getElementById(buttonId).className = 'globalNavButton globalNavButtonInactive globalNavButtonLink';
}

// validate email address
function validateEmail(elementValue){  
	var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;  
	return emailPattern.test(elementValue);  
}

// check whether an ENTER key was pressed and return true/false
function checkToSubmitForm(event) {
	
	var keyCode = event.which;
	if (keyCode == undefined) {
		keyCode = event.keyCode;
	}
	if (keyCode == 13) {
		return true;
	} else {
		return false;
	}
}

// javascript to remove all options from a select box
function removeAllOptions(selectbox)
{
	var i;
	for(i=selectbox.options.length-1;i>=0;i--)
	{
		selectbox.remove(i);
	}
}