function abreJanela(url, largura, altura, scrollbar, statusbar)
{
   var esquerda = (screen.width)  ? (screen.width-largura) / 2 : 0;
   var topo     = (screen.height) ? (screen.height-altura) / 2 : 0;
   var str = 'height='+altura+', width='+largura+', top='+topo+', left='+esquerda+', scrollbars='+scrollbar+', status='+statusbar+'';
   var janela = window.open(url, 'imagem', str);
   janela.focus();
}

// listas
startList = function() {
	//code only for IE
	if(!document.body.currentStyle) return;
	var subs = document.getElementsByName('submenu');
	for(var i=0; i<subs.length; i++) {
		var li = subs[i].parentNode;
		if(li && li.lastChild.style) {
			li.onmouseover = function() {
				this.lastChild.style.visibility = 'visible';
			}
			li.onmouseout = function() {
				this.lastChild.style.visibility = 'hidden';
			}
		}
	}
}
window.onload=startList;


// Valida campos de formulario.
function validaForm(form_obj)
{
	pjReq = new Array();
	pjDef = new Array();
	pfReq = new Array("nome", "empresa", "fone", "email", "mensagem");
	pfDef = new Array("Nome", "Empresa", "Telefone", "E-mail", "Mensagem");

	fieldRequired    = pjReq.concat(pfReq);
	fieldDescription = pjDef.concat(pfDef);

	var alertMsg = "Preencha os campos:\n";

	var l_Msg = alertMsg.length;
	var step = "";

	for (var i = 0; i < fieldRequired.length; i++)
	{
		var obj = form_obj.elements[fieldRequired[i]];
		if (obj)
		{
			switch(obj.type)
			{
				case "select-one":
					if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == "")
					{
						alertMsg += " - " + fieldDescription[i] + "\n";
						step = i;
					}
					break;
				case "select-multiple":
					if (obj.selectedIndex == -1)
					{
						alertMsg += " - " + fieldDescription[i] + "\n";
						step = i;
					}
					break;
				case "text":
				case "password":
				case "textarea":
					if (obj.value == "" || obj.value == null)
					{
						alertMsg += " - " + fieldDescription[i] + "\n";
						step = i;
					}
					break;
				default:
			}

			if (obj.type == undefined)
			{
				var blnchecked = false;
				for (var j = 0; j < obj.length; j++)
				{
					if (obj[j].checked)
					{
						blnchecked = true;
					}
				}
				if (!blnchecked)
				{
					alertMsg += " - " + fieldDescription[i] + "\n";
					step = i;
				}
			}
		}
	}

	if (alertMsg.length == l_Msg)
	{
		abreJanela('tpl/tpl/sucesso.htm', 350, 140);
		return true;
	}
	else {
		alert(alertMsg);
		return false;
	}

}