function validaBusca(strNameForm) {
	var objForm = eval("document." + strNameForm);
	if (objForm.q.value.length==0 ) { 
			alert("Campo de busca não preenchido !"); 
			objForm.q.focus();
			objForm.q.select();
			return false; 
	}
	if (strNameForm != "busca_unesp_topo") {
		ver_radio = "";
		for (var i = 0; i < objForm.sitesearch.length; i++) {
			if (objForm.sitesearch[i].checked) {
				ver_radio=objForm.sitesearch[i].value;
			}
		}
		if (ver_radio == "") {
			alert("Escolha a fonte de busca a realizar...");
			return false;
		}
		else {
			objForm.submit();
			return false;
		}
	}
	else {
		objForm.submit();
		return false;
	}
}