function emailFocus(obj) {
	if (obj.value == 'enter your email here') {
		obj.value = '';
		obj.style.color='#3F3F3F';
	}
}

function emailBlur(obj) {
	if (obj.value == '') {
		obj.value = 'enter your email here';
		obj.style.color='#8c8c8c';
	}
}

function emailCheck(str) {
	var emailRegEx = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if(str.match(emailRegEx)){
		return true;
	} else {
		return false;
	}
}

function formSubmit(obj){
	if (emailCheck(obj.email.value) == true && obj.email.value != 'enter your email here') {
		return true;
	} else {
		alert('Please enter a valid email address.');
		return false;
	}
}