var wnd = 0;

function showLayer(id)
{
	document.getElementById(id).style.visibility='visible';
	document.getElementById(id).style.display='block';
}

function hideLayer(id)
{
	document.getElementById(id).style.visibility='hidden';
	document.getElementById(id).style.display='none';
}

function toggleLayer(id)
{
	try {
//		if(document.getElementById(id).style.visibility == 'visible')	hideLayer(id);
//		else showLayer(id);
		if(document.getElementById(id).style.visibility == 'visible')	currentOpac(id, 0, 200);
		else currentOpac(id, 100, 200);
	}
	catch(err) {}
}


function showLayer_inline(id)
{
	document.getElementById(id).style.visibility='visible';
	document.getElementById(id).style.display='inline';
}

function toggleLayer_inline(id)
{
	if(document.getElementById(id).style.visibility == 'visible')	hideLayer(id);
	else showLayer_inline(id);
}



function Hash()
{
	this.length = 0;
	this.items = new Array();
	for (var i = 0; i < arguments.length; i += 2) {
		if (typeof(arguments[i + 1]) != 'undefined') {
			this.items[arguments[i]] = arguments[i + 1];
			this.length++;
		}
	}
   
	

	this.getItem = function(in_key) {
		return this.items[in_key];
	}

	this.setItem = function(in_key, in_value)
	{
		if (typeof(in_value) != 'undefined') {
			if (typeof(this.items[in_key]) == 'undefined') {
				this.length++;
			}

			this.items[in_key] = in_value;
		}
	   
		return in_value;
	}

	this.hasItem = function(in_key)
	{
		return typeof(this.items[in_key]) != 'undefined';
	}
}

var toggleMenuLoad_on = new Hash();
var toggleMenuLoad_cache = new Hash();

function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

		if(opacEnd == 100)
		{
			changeOpac(0, id);
			showLayer(id);
		}

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";

		if(opacity == 100) showLayer(id);
		else if(opacity == 0)	hideLayer(id);
} 

function currentOpac(id, opacEnd, millisec)
{
	//standard opacity is 100
	var currentOpac = 100;
    
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100)
	{
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	if(currentOpac == 0) currentOpac = 1;
	if(currentOpac == 100) currentOpac = 99;

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}

function addFavorite() {
	title = "газовые баллоны,смеси"; 
	url = "http://www.promtechresurs.ru/";
	if(window.external) {
		window.external.AddFavorite(url, title);
	} else {
		alert("К сожалению ваш браузер не поддерживает эту функцию. Нажмите клавиши 'Ctrl+D'");
	}
	return false;
}

function change_mpp(mpp)
{
	document.getElementById('mpp_selector').innerHTML = 'загрузка...';
	var req = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
  req.onreadystatechange = function() {
		if (req.readyState == 4)
		{
			location.reload();
		}	
  }
  req.open("GET", '/do/change_mpp.php?mpp='+mpp, true);
  req.send(null);		
}

function scroll_to_photo(id)
{
	scroll_to_layer('photo_'+id);
}

function scroll_to_layer(id)
{
	try { document.getElementById(id).scrollIntoView(true); }
	catch(err) {}
}

var search_opened = 0;
var search_buffer = '';
function toggleSearch()
{
	if(search_opened == 0)
	{
		search_buffer = document.getElementById('fsl_p').innerHTML;	
		document.getElementById('fsl_p').innerHTML = document.getElementById('fsl').innerHTML;
		search_opened = 1;
	}
	else
	{
		document.getElementById('fsl_p').innerHTML = search_buffer;
		search_buffer = '';
		
		search_opened	= 0;
	}	
}