///////////////Pesquisa
function limpar_pesquisa() {
	if (document.F_pesquisa.string.value == " insira palavra")
		document.F_pesquisa.string.value = "";
} 

function escrever_pesquisa() {
	if (document.F_pesquisa.string.value == "")
	document.F_pesquisa.string.value = " insira palavra";
} 


/////////////Newsletter
function limpar_newsletter() {
	if (document.F_newsletter.email.value == " insira email")
		document.F_newsletter.email.value = "";
} 

function escrever_newsletter() {
	if (document.F_newsletter.email.value == "")
	document.F_newsletter.email.value = " insira email";
}