var reqArr = new Array();

function initRequest(url) {
	if (window.XMLHttpRequest) {
		return new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		isIE = true;
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
}

function carregando(obj) {
	obj.innerHTML = "" +
			"<table width='100%' height='100%' border='0'>" +
			"	<tr>" +
			"		<td align='center' valign='middle'><img src='images/loading.gif' border='0'/></td>" +
			"	</tr>" +
			"</table>";
}

function ChamaPaginaArray(url, obj, funcao, showLoading) {
	ajaxObj = new Object();
	ajaxObj.method = "GET";
	ajaxObj.url = url;
	ajaxObj.retorno = obj;
	ajaxObj.funcao = funcao;
	ajaxObj.showLoading = showLoading;

	reqArr.push(ajaxObj);
    if(reqArr.length == 1){
		openAjax(reqArr[0]);
	}
}

function ChamaPaginaPost(url, obj, funcao, showLoading) {
	ajaxObj = new Object();
	ajaxObj.method = "POST";
	ajaxObj.url = url;
	ajaxObj.retorno = obj;
	ajaxObj.funcao = funcao;
	ajaxObj.showLoading = showLoading;

	reqArr.push(ajaxObj);
    if(reqArr.length == 1){
		openAjax(reqArr[0]);
	}
}

function openAjax(ajaxObj) {
	try {
		if( ajaxObj.url.indexOf("?") > 0 || ajaxObj.url.indexOf("&") > 0 ) {
			ajaxObj.url += "&AjaxRequestUniqueId=" + new Date().getTime();
		} else {
			ajaxObj.url += "?AjaxRequestUniqueId=" + new Date().getTime();
		}

		xmlHttp = initRequest(ajaxObj.url);
		xmlHttp.onreadystatechange = function(){
			objRetorno = document.getElementById(ajaxObj.retorno);

			if(xmlHttp.readyState == 4){
				try{
					objRetorno.innerHTML = xmlHttp.responseText;
					try{
						if(ajaxObj.funcao != 'undefined') eval(ajaxObj.funcao);
					}catch(e){
					}
	 				reqArr.shift();
	 				
	 				try {
						if( xmlHttp.responseText.indexOf("class=\"gradient") > 0 ) {
							createGradient();
						}
					} catch(e) {
					}
					
					if(reqArr.length > 0){
						openAjax(reqArr[0]);
					}
				}catch(e){
					alert(e.message);
					objRetorno.innerHTML = "<br/><center>Houve um erro para efetuar a requisição ao servidor. Tente novamente mais tarde.</center>";

					reqArr.shift();
		 			openAjax(reqArr[0]);
				}
			}else{
				try{
					if(ajaxObj.showLoading || ajaxObj.showLoading == undefined){
				  		carregando(objRetorno);
			  		}
			  	}catch(e){
			  	}
		  	}
		};
		if(ajaxObj.method == "POST"){
			ajaxObj.url = ajaxObj.url.replace("web?", "");
			xmlHttp.open("POST","web",true);
			xmlHttp.setRequestHeader('Content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
			xmlHttp.setRequestHeader("Content-length", ajaxObj.url.length);
			xmlHttp.send(ajaxObj.url);
		}else{
			xmlHttp.open("GET", ajaxObj.url, true);
			xmlHttp.setRequestHeader('Content-type', 'charset=UTF-8');
			xmlHttp.send(ajaxObj.url);
		}
	} catch(e) {
//		alert('erro AJAX - ' + e.message );
	}
}

function createQuerySimple(formX) {
	return 	"web?sid=" + formX.sid.value +
			"&command=" + formX.command.value +
		    "&action=" + formX.action.value
	;
}

function createQueryString(form){
   var retorno = new String("");
   for(var i = 0; i < form.length; i++){
      if(form[i].type != "button" && form[i].type != "submit" && form[i].type != "radio" && form[i].type != "checkbox"){
         retorno += form[i].name + "=" + form[i].value + "&";
      }else if(form[i].type == "radio" || form[i].type == "checkbox"){
         if(form[i].checked && form[i].name.indexOf('marcada') < 0 ){
            retorno += form[i].name + "=" + form[i].value + "&";
         }
      }
   }
   
   return "web?" + retorno + "serializedForm=true";
}

function createQueryStringFields(form, campos){
   try {
	   var retorno = new String("");
	   for(var i = 0; i < form.length; i++){
	   	  var nomeCampo = form[i].name;
	   	  if( nomeCampo.indexOf("_") > 0 ) {
	   	      nomeCampo = nomeCampo.substring(0, nomeCampo.indexOf("_")+1 );
	   	  }
	   	  
	   	  if( campos.indexOf(";" + nomeCampo + ";") >= 0 ) {
		      if(form[i].type != "button" && form[i].type != "submit" && form[i].type != "radio" && form[i].type != "checkbox"){
		         retorno += form[i].name + "=" + form[i].value + "&";
		      }else if(form[i].type == "radio" || form[i].type == "checkbox"){
		         if(form[i].checked){
		            retorno += form[i].name + "=" + form[i].value + "&";
		         }
		      }
	   	  }
	   }
	   return "web?" + retorno + "serializedForm=true";
	   
	} catch(e){
	   return createQueryString(form); 
	}
}

function replaceQuebraLinha(campo, pattern){
	var regex = /\n/;
	while(campo.match(regex)){
		campo = campo.replace(regex, pattern);
	}
	return campo;
}