function msgInit()
{	
	var objBody = document.getElementsByTagName("body").item(0);		
	var objOverlay = document.createElement("div");
	//objOverlay.style.display = 'none';
	objOverlay.id = 'overlay';
	objOverlay.onclick = function() { }
	objBody.appendChild(objOverlay);
	
	var objMsgOuter = document.createElement("div");
	//objOverlay.style.display = 'none';
	objMsgOuter.id = 'msg-outer';
	objBody.appendChild(objMsgOuter);
	
	var objMsg = document.createElement("div");
	//objOverlay.style.display = 'none';
	objMsg.id = 'msg-dialog';
	objMsgOuter.appendChild(objMsg);
}

function showMsg(html)
{
	var arrayPageSize = getPageSize();
	document.getElementById('overlay').style.width = arrayPageSize[0]+'px';
	document.getElementById('overlay').style.height = arrayPageSize[1]+'px';

	// calculate top and left offset for the lightbox 
	var arrayPageScroll = getPageScroll();
	var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 3);
	var lightboxLeft = arrayPageScroll[0];
	document.getElementById('msg-outer').style.top = lightboxTop+'px';
	document.getElementById('msg-outer').style.left = lightboxLeft+'px';
	document.getElementById('msg-dialog').innerHTML = html;

	document.getElementById('overlay').style.display = 'block';
	document.getElementById('msg-dialog').style.display = 'block';
	document.getElementById('msg-outer').style.display = 'block';
	
	hideObjects();
}

function closeMsg()
{
	document.getElementById('overlay').style.display = 'none';
	document.getElementById('msg-dialog').style.display = 'none';
	document.getElementById('msg-outer').style.display = 'none';
	showObjects();
}

function showOk(text, icon)
{
	html = '<table width="100%"><tr>';
	if(typeof(icon) == 'undefined') icon = '/img/notice.gif';
	if(typeof(icon) != 'undefined') 
	{
		html = html + '<td width="30"><img style="padding-top: 10px; padding-left: 10px" src="' + icon + '"/></td>';
	}
	html = '<td><div class="text">' + text + '</div></td></tr></table>';
	head = '<div class="title"><img src="/img/ico_close.gif" style="float: right; margin-top: 1px; cursor:pointer" onclick="closeMsg();"/>Eurec.cz</div>'
	button = '<div id="msg-ok">\
					<img onmouseout="this.src=\'/img/ok-button.gif\'" onmouseover="this.src=\'/img/ok-button-blue.gif\'" style="cursor: pointer" src="/img/ok-button.gif" onclick="closeMsg();"/>\
			</div>';
	showMsg(head + html + button);
}

function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}

function getVisib(obj){
			var value = obj.style.visibility;
			if (!value) {
				if (document.defaultView && typeof (document.defaultView.getComputedStyle) == "function") { // Gecko, W3C
				} else if (obj.currentStyle) { // IE
					value = obj.currentStyle.visibility;
				} else
					value = '';
			}
			return value;
		};


function hideObjects()
{
	var tags = new Array("applet", "select");
/*		var el = document.getElementById('msg-dialog');
		var p = findPos(el);
		var EX1 = p[0];
		var EX2 = el.offsetWidth + EX1;
		var EY1 = p[1];
		var EY2 = el.offsetHeight + EY1;		
*/		
		for (var k = tags.length; k > 0; ) {
			var ar = document.getElementsByTagName(tags[--k]);
			var cc = null;

			for (var i = ar.length; i > 0;) {
				cc = ar[--i];
				cc.__msh_save_visibility = getVisib(cc);
				cc.style.visibility = "hidden";
			}
		}
}

function showObjects()
{
	var tags = new Array("applet", "select");
		
		for (var k = tags.length; k > 0; ) {
			var ar = document.getElementsByTagName(tags[--k]);
			var cc = null;

			for (var i = ar.length; i > 0;) {
				cc = ar[--i];
				cc.style.visibility = cc.__msh_save_visibility;
			}
		}
}


//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

	arrayPageScroll = new Array(xScroll,yScroll) 
	return arrayPageScroll;
}