var request;
var dest;
var contentDiv;
var CurGd;

function TrimString (sInString){
	sInString = sInString.replace(/ /g,' ');
	return sInString.replace(/(^\s+)|(\s+$)/g, '');
}

function GetBrow() {
	if (window.navigator.userAgent.indexOf ("Opera") >= 0)  {  	return(15)  } else
	if (window.navigator.userAgent.indexOf ("Gecko") >= 0)  {  	return(25)  } else
	if (window.navigator.userAgent.indexOf ("MSIE")  >= 0)  {  	return(-5)   } else 	return(0)
}

function stat(n)
{
  switch (n) {
    case 0:
      return "<center><span align=center style='font-family: Tahoma; font-size: 15px; text-decoration: none; color: #666666;'><br><br><img src='images/ajax-loader.gif'><br><br>не инициализирован</span></center>";
    break;
 
    case 1:
      return "<table width='690' border='0' cellspacing='0' cellpadding='0'><tr><td height='98' background='images/j/top.png'></td></tr><tr><td height='433' align='center' valign='middle' background='images/j/c.png'><img src='images/ajax-loader.gif'><br><br>загрузка...</td></tr><tr><td height='61' background='images/j/bottom.png'></td></tr></table>";
    break;

    case 2:
      return "<table width='690' border='0' cellspacing='0' cellpadding='0'><tr><td height='98' background='images/j/top.png'></td></tr><tr><td height='433' align='center' valign='middle' background='images/j/c.png'><img src='images/ajax-loader.gif'><br><br>загружено</td></tr><tr><td height='61' background='images/j/bottom.png'></td></tr></table>";
	break;

    case 3:
      return "<table width='690' border='0' cellspacing='0' cellpadding='0'><tr><td height='98' background='images/j/top.png'></td></tr><tr><td height='433' align='center' valign='middle' background='images/j/c.png'><img src='images/ajax-loader.gif'><br><br>в процессе...</td></tr><tr><td height='61' background='images/j/bottom.png'></td></tr></table>";
    break;
 
    case 4: 
      return "<center><span align=center style='font-family: Tahoma; font-size: 15px; text-decoration: none; color: #666666;'><br><br><img src='images/ajax-loader.gif'><br><br>готово</span></center>";
    break;
 
    default:
      return "<center><span align=center style='font-family: Tahoma; font-size: 15px; text-decoration: none; color: #666666;'><br><br>неизвестное состояние<br><br></span></center>";
  } 
}

function stat_all(n)
{
  switch (n) {
    case 0:
      return "<center><span align=center style='font-family: Tahoma; font-size: 15px; text-decoration: none; color: #666666;'><br><br><img src='images/ajax-loader.gif'><br><br>не инициализирован</span></center>";
    break;
 
    case 1:
      return "<table width='690' border='0' cellspacing='0' cellpadding='0'><tr><td height='98' background='images/j/top.png'></td></tr><tr><td height='433' align='center' valign='middle' background='images/j/c.png'><img src='images/ajax-loader.gif'><br><br>загрузка...</td></tr><tr><td height='61' background='images/j/bottom.png'></td></tr></table>";
    break;

    case 2:
      return "<table width='690' border='0' cellspacing='0' cellpadding='0'><tr><td height='98' background='images/j/top.png'></td></tr><tr><td height='433' align='center' valign='middle' background='images/j/c.png'><img src='images/ajax-loader.gif'><br><br>загружено</td></tr><tr><td height='61' background='images/j/bottom.png'></td></tr></table>";
	break;

    case 3:
      return "<table width='690' border='0' cellspacing='0' cellpadding='0'><tr><td height='98' background='images/j/top.png'></td></tr><tr><td height='433' align='center' valign='middle' background='images/j/c.png'><img src='images/ajax-loader.gif'><br><br>в процессе...</td></tr><tr><td height='61' background='images/j/bottom.png'></td></tr></table>";
    break;
 
    case 4: 
      return "<center><span align=center style='font-family: Tahoma; font-size: 15px; text-decoration: none; color: #666666;'><br><br><img src='images/ajax-loader.gif'><br><br>готово</span></center>";
    break;
 
    default:
      return "<center><span align=center style='font-family: Tahoma; font-size: 15px; text-decoration: none; color: #666666;'><br><br>неизвестное состояние<br><br></span></center>";
  } 
}

function processStateChange(){
  contentDiv = document.getElementById(dest);
  contentDiv.innerHTML = stat(request.readyState);
  if (request.readyState == 4){
    if (request.status == 200){
		response = request.responseText;
		contentDiv.innerHTML = response;
    } else {
		contentDiv.innerHTML = "Ошибка загрузки: Стутус "+request.status;
    }
  }
}

function processStateChangeNo(){
  contentDiv = document.getElementById(dest);
  if (request.readyState == 4){
    if (request.status == 200){
		response = request.responseText;
		if (response.charAt(0) == '$') {
			alert('Товар добавлен в корзину');
			contentDiv.innerHTML = response.substr(1);
		} else {
			contentDiv.innerHTML = response;
		}
    } else {
		contentDiv.innerHTML = "Error: Status "+request.status;
    }
  }
}


function loadHTML(url, destination, stat){
    dest = destination;
    request = null;
    if (window.XMLHttpRequest) {
        try {
            request = new XMLHttpRequest();
        } catch (e){}
    } else if (window.ActiveXObject) {
        try {
            request = new ActiveXObject('Msxml2.XMLHTTP');
        } catch (e){
            try {
                request = new ActiveXObject('Microsoft.XMLHTTP');
            } catch (e){}
        }
    }

    if (request) {
		if (stat == 1) {
	        request.onreadystatechange = processStateChange;
		} else {
	        request.onreadystatechange = processStateChangeNo;
		}
        request.open("GET", url, true);
        request.send(null);
    } else {
        alert("Ваш браузер не поддерживает JavaScript");
    }
}

function myAjax (URL, destination) {
	blockdiv(destination);
    contentDiv = document.getElementById(destination);
	if (destination == 'ajaxcontent') {
    	loadHTML(URL, destination, 0);
	} else {
    	loadHTML(URL, destination, 1);
	}
	window.scroll(0,0);
}


