if (window.attachEvent) {
	window.attachEvent('onload', activate);
}
else if (window.addEventListener) {
	window.addEventListener('load', activate, false);
}
else {
	document.addEventListener('load', activate, false);
}

function activate() {
	if(document.getElementById && document.getElementsByTagName) {
		var form = document.getElementById('newsletter');
		var inputs = form.getElementsByTagName('input');
		for (var i in inputs) {
			if(inputs[i].className == 'text slumber') {
				inputs[i].onfocus = function () {
					this.className = 'text';
					if(this.value == 'emailadres' | this.value == '') {
						this.value = '';
					}
				}
				inputs[i].onblur = function () {
					if(this.value == 'emailadres' | this.value == '') {
						this.className = 'text slumber';
						this.value = 'emailadres';
					}
				}
			}
		}
	}
}