// JavaScript Document

function addEvent(obj, evType, fn){ 
 if (obj.addEventListener){ 
   obj.addEventListener(evType, fn, false); 
   return true; 
 } else if (obj.attachEvent){ 
   var r = obj.attachEvent("on"+evType, fn); 
   return r; 
 } else { 
   return false; 
 } 
}


function reemplazar_campos_login(){
	var div_usuarios = document.getElementById("usuarios");
	if (div_usuarios){
		var campos = div_usuarios.getElementsByTagName("input");
		var tipo;
		for (var i = 0; i<campos.length; i++){
			tipo = campos[i].getAttribute("type")
			if(tipo == "text" || tipo == "password" ){
					campos[i].onfocus = function(){
						envoid(this);
					}
					campos[i].onblur = function(){
						novoid(this);
					}
			}
		}
	}
}

function envoid(campo){
	if(campo.value == campo.defaultValue){
		campo.value="";
	}
}

function novoid(campo){
	if(campo.value == ""){
		campo.value=campo.defaultValue;
	}
}

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
}

addEvent(window, 'load', reemplazar_campos_login);

/*function gAnalytics(){
	var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
	var cabeza = document.getElementsByTagName("head")[0];
	var scanalytics = document.createElement("script");
	scanalytics.setAttribute("type", "text/javascript")
	scanalytics.setAttribute("src", gaJsHost + "google-analytics.com/ga.js");
	scanalytics.onload = scanalytics.onreadystatechange = function(){
		try {
			var pageTracker = _gat._getTracker("UA-645895-9");
			pageTracker._initData();
			pageTracker._trackPageview();
		} catch(err) {
		}	
	}
	cabeza.appendChild(scanalytics);
}

addEvent(window, 'load', gAnalytics);*/