function $(it) { return document.getElementById(it); }
f = $('form')

fields_not_empty = new Array('f_name', 'l_name', 'email', 'phone')
fields_email =  new Array('email')


function validate() {
	var valid = true
	
	a = fields_not_empty
	for (var i = 0; i < a.length; i++)
	{
		var v = (f[a[i]].value.length > 0)
		valid = valid && v
		div = $(a[i] + '_validation')
		if (!v)
			div.innerHTML = '<font style=\"color: #F00; font-size: 9px; font-family: Arial;\"><b>*Required</b></font>'
		else
			div.innerHTML = ''
	}
	a = fields_email
	for (var i = 0; i < a.length; i++)
	{
		var v = /^[A-Za-z0-9_\.\-]+\@([A-Za-z0-9][A-Za-z0-9\-]*\.)+[a-zA-Z]{2,8}$/.test(f[a[i]].value)
		valid = valid && v
		div = $(a[i] + '_validation')
		if (!v)
			div.innerHTML = '<font style=\"color: #F00; font-size: 9px; font-family: Arial;\"><b>*Valid Email Required</b></font>'
		else
			div.innerHTML = ''
	}

	return valid
}

focusField('f_name')
f.onsubmit = function() { return validate();  

}