function emailContent(){
	obj = document.formextranet.email;
	if (obj.value == ''){
		obj.value = 'Digite seu e-mail';
	}
}
function clearEmail(obj){
	if (obj.value == 'Digite seu e-mail'){
		obj.value = '';
	}
}
function senhaContent(){
	obj = document.formextranet.senha;
	if (obj.value == ''){
		obj.value = '123456';
	}
}
function clearSenha(obj){
	if (obj.value == '123456'){
		obj.value = '';
	}
}
function openWindow(url){
	window.open(url, null, 'width=600,height=400,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no');
}