/**
 * funkce button
 * @param obj_ ukazuje na objekt IMG
 * @param mode_ true tlacitko rozsvicene, false je zhasnute
 * 
 */
function button(obj_,mode_)
{
	if(obj_.src.indexOf ('.jpg')!=-1)
	{
		if(mode_ && obj_.src.indexOf ('_on.jpg')==-1)
			obj_.src = obj_.src.replace(/.jpg/,'_on.jpg');
		if(!mode_ && obj_.src.indexOf ('_on.jpg')>0)
			obj_.src = obj_.src.replace(/_on.jpg/,'.jpg');
	}
	else if(obj_.src.indexOf ('.gif')!=-1)
	{
		if(mode_ && obj_.src.indexOf ('_on.gif')==-1)
			obj_.src = obj_.src.replace(/.gif/,'_on.gif');
		if(!mode_ && obj_.src.indexOf ('_on.gif')>0)
			obj_.src = obj_.src.replace(/_on.gif/,'.gif');
	}
	
}

/**
 * funkce otevreni obrazku
 * @param obj_ ukazuje na objekt IMG
 * @param mode_ true tlacitko rozsvicene, false je zhasnute
 * 
 */
function openBig(pic_id_) 
{ 
	x = 250;
	y = 180;
	url='/openbig.php?&url='+pic_id_;
	var scr = window.screen;
	var xorig = scr.availWidth / 2 - x / 2 ;
	var yorig = scr.availHeight /  2 - y / 2 ;
	var dialog = window.open(url,'dialog',"top="+yorig+",left="+xorig+",height="+y+",width="+x+",status=0,toolbar=no,menubar=0,location=0");
	dialog.focus();
}

function change_video_news(url_,href_)
{
	pic_ = document.getElementById('videonewsimage');
	pic_.src = 'user_images/'+url_;	
	a_ = document.getElementById('videonewslink');
	a_.href = href_;	
}

function changeactualnews()
{
	a_ = document.getElementById('videonewslink');
	a_.href = href_;	
	pic_ = document.getElementById('videonewsimage');
	pic_.src = 'user_images/'+url_;	
	
}


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 ranking_show(parent_,id_)
{
	table_ = document.getElementById('edu_table');

	table_.innerHTML = '<img src="images/hourglass.gif">';
	
	table_.style.top = findPos(parent_)[1]+10;
	table_.style.left = findPos(parent_)[0]+50;
	table_.style.display = '';
	synonyma(table_,id_);
}

function synonyma(obj_,id_)
{
	var http_request = false;
	//var string = document.getElementById('string').value;
	var request = "ID_PLAYER="+id_;//+string;

    if (window.XMLHttpRequest) 
    	{
            http_request = new XMLHttpRequest();
        } else if (window.ActiveXObject) {
            try {
              http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (eror) {
              http_request = new ActiveXObject("Microsoft.XMLHTTP");
            }
        }

        http_request.onreadystatechange = function() { zpracuj(http_request,obj_); };
        http_request.open('GET', 'edu_ranking_detail.php?ID_PLAYER='+id_, true);
        //http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        http_request.send(null);
}

function zpracuj(http_request,obj_) 
{
	if (http_request.readyState == 4) 
	{
    	if (http_request.status == 200) {
               // alert(http_request.responseText);
                obj_.innerHTML = http_request.responseText;
        } else 
        {
			alert('Chyba');
        }
	}
}