startList = function() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("nav");
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
		}
	}
}

window.onload=startList;

function empresa() {
	document.getElementById("empresa").style.backgroundImage = "url('images/menu_li_bg.gif')";
	document.getElementById("empresa").style.color = "#666666";
}
function empresa_out() {
	document.getElementById("empresa").style.backgroundImage = "none";
	document.getElementById("empresa").style.color = "#FFFFFF";
}

function servicos() {
	document.getElementById("servicos").style.backgroundImage = "url('images/menu_li_bg.gif')";
	document.getElementById("servicos").style.color = "#666666";
}
function servicos_out() {
	document.getElementById("servicos").style.backgroundImage = "none";
	document.getElementById("servicos").style.color = "#FFFFFF";
}

function tabelas() {
	document.getElementById("tabelas").style.backgroundImage = "url('images/menu_li_bg.gif')";
	document.getElementById("tabelas").style.color = "#666666";
}
function tabelas_out() {
	document.getElementById("tabelas").style.backgroundImage = "none";
	document.getElementById("tabelas").style.color = "#FFFFFF";
}

/* Formulario */

function formCheck(formobj){
	var fieldRequired = Array("nome", "email", "telefone", "assunto", "mensagem");
	var fieldDescription = Array("Nome", "Email", "Telefone", "Assunto", "Mensagem");
	var alertMsg = "Por favor, complete os seguintes campos:\n";
	
	var l_Msg = alertMsg.length;
	
	for (var i = 0; i < fieldRequired.length; i++){
		var obj = formobj.elements[fieldRequired[i]];
		if (obj){
			switch(obj.type){
			case "select-one":
				if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == ""){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "select-multiple":
				if (obj.selectedIndex == -1){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "text":
			case "textarea":
				if (obj.value == "" || obj.value == null){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				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";
				}
			}
		}
	}

	if (alertMsg.length == l_Msg){
		return true;
	}else{
		alert(alertMsg);
		return false;
	}
}