function selecionarSelect(form_name, form_input, valor) {

	var nIndex = document.getElementById(form_name).elements[form_input].options.length;
	for (var i=0;i<nIndex;i++){
		if(document.getElementById(form_name).elements[form_input].options[i].value == valor) {
			document.getElementById(form_name).elements[form_input].options[i].selected = true;
			break;
		}
	}
}