var campos = Array();
campos["nome"]="Nome";
campos["email"]="E-mail";
campos["mensagem"]="Recado";
campos["assunto"]="Assunto";

function validaEntrada(formulario){
	
	for(i=0;i<formulario.elements.length;i++){
	
		erro=false;
		if(formulario.elements[i].type=="text"){
			if(formulario.elements[i].value==""){
				erro = true;
			}
		}
		else if(formulario.elements[i].type=="textarea"){
			if (formulario.elements[i].value==""){
				erro = true;
			}

		}
		if (erro==true){
			alert("Entre com o campo " + campos[formulario.elements[i].name] + " corretamente");
			formulario.elements[i].focus();
			return false;
		}
	}
	formulario.submit();
}

String.prototype.trim = function()
{
return this.replace(/^\s*/, "").replace(/\s*$/, "");
}