function selectField() {
	
	if (this.value==this.title) {
		
		this.value = "";
		
	}
	
}

function blurField() {
	
	if (this.value=="") {
		
		this.value = this.title;
		
	}
	
}

function validateField() {
	
	var submitButtonDisabled = false;
	
	if (this.value.indexOf("@")==-1) {
	
		submitButtonDisabled = true;
		
	}
	
	if (this.value.indexOf(".")==-1) {
	
		submitButtonDisabled = true;
		
	}
	
	if (this.value=="") {
	
		submitButtonDisabled = true;
		
	}
	
	document.getElementById("btnSubmit").disabled = submitButtonDisabled;
	
}

function submitForm() {
	
	document.formVoucher.submit;
	
	document.getElementById("voucherBox").style.display='none';
	document.getElementById("voucherConfirm").style.display='inline';
	
}

function prepareInputs() {
	
	var inputs = document.getElementsByTagName("input");
	
	for (var i=0; i < inputs.length; i++) {
		
		if (inputs[i].id == "fldEmail") {
		
			inputs[i].onclick = selectField;
			inputs[i].onblur  = blurField;
			inputs[i].onkeyup = validateField;
		
		}
		
		if (inputs[i].id == "btnSubmit") {
		
			inputs[i].onclick = submitForm;
		
		}
		
	}
	
}

function preparePage() {
	
	if (!document.getElementsByTagName) return;
	
	prepareInputs();
	
}

window.onload = preparePage;