function openAjax(){
	var ajax;
	try{
		ajax = new XMLHttpRequest();
	}catch(e){
		try{
			ajax = new ActiveXObject("Msxml2.XMLHTTP");
		}catch(ee){
			try{
				ajax = new ActiveObject("Microsoft.XMLHTTP");
			}catch(eee){
				ajax = false;
			}
		}
	}
	return ajax;
}



function ajaxOpen(div, loadHtml, action, method){
	var ajax = openAjax();
	if(ajax){
		  document.getElementById(div).innerHTML = loadHtml;
          ajax.open(method, action, true)
          ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
		  ajax.onreadystatechange=function() {
		  
		  if (ajax.readyState==4){
				document.getElementById(div).innerHTML = ajax.responseText;
				var html = ajax.responseText;
				extraiScript(html);	
		  }
		} 
		 ajax.send(null);
	}
}

//injeção de javascript requisição ajax
function extraiScript(texto){
	 var ini = 0; 
        while (ini!=-1){
                ini = texto.indexOf('<script', ini);
                if (ini >=0){     
                        ini = texto.indexOf('>', ini) + 1;
                        var fim = texto.indexOf('</\script>', ini);    
                        codigo = texto.substring(ini,fim); 
                        novo = document.createElement("script");
                        novo.text = codigo;
                        document.body.appendChild(novo);
   			}
        }
} 

function requisicaoBaseAjax(div, load, action, values, baseUrl){
	var loadAjax ='<div  style="width: 30px; text-align: center; margin: auto; margin-top: 10%;"><img alt="load" src="' + load + '"></div>';
	var actionAjax = baseUrl + '/' + action + '?' + values
	
	ajaxOpen(div, loadAjax, actionAjax, "GET");
}

function requisicaoBasePostAjax(div, load, action, values, baseUrl){
	var loadAjax ='<div style="width: 30px; text-align: center; margin: auto; margin-top: 10%;"><img alt="load" src="' + load + '"></div>';
	var actionAjax = baseUrl + '/' + action + '?' + values	
	ajaxOpen(div, loadAjax, actionAjax, "POST");
}

function requisicaoElementCustomAjax(div, elements, action, values, baseUrl){
	var loadAjax = elements;
	var actionAjax = baseUrl + '/' + action + '?' + values
	
	ajaxOpen(div, loadAjax, actionAjax, "GET");
}

function requisicaoDivCustomAjax(div, divStyle, load, action, values, baseUrl){
	var loadAjax ='<div style="' + divStyle + '"><img alt="" src="' + load + '"></div>';
	var actionAjax = baseUrl + '/' + action + '?' + values
	
	ajaxOpen(div, loadAjax, actionAjax, "GET");
}