function OpenWindow(url, headerText, contentText ) {
        
        var windowStyle = Array(
            'width: 50%;',
            'height: 50%;',
            'top: 100px; ',
            'left: 100px; ',
            'border: 1px solid #000; ',
            'position: absolute; ',
            'z-index: 100; ',
            'background-color:#ede9e3;'
        );
        
        var headStyle = Array(
            'background-color: #468bcc;',
            'border-top: 1px solid #7cb6ec;',
            'border-left: 1px solid #7cb6ec;',
            'height: 22px; ',
            'border-right: 1px solid #3c72a5;',
            'border-bottom: 1px solid #3c72a5;',
            'margin: 0;',
            'text-align:center;',
            'color:#fff;',
            'font-weight:bold;',
            'cursor:move;'
        );
        
        var contStyle = Array(
            'border-left:1px solid #fff;',
            'border-right:1px solid #d6cec3;',
            'border-top:1px solid #eaeaea;',
            'margin:0; '
        );
        
        var domDoc=Sarissa.getDomDocument();
        var layer=domDoc.createElement('div');
        var style='';
        for(var i=0;i<windowStyle.length;i++)
            style+=windowStyle[i];

        layer.setAttribute('style',style);
        layer.setAttribute('class','window');

        var old=document.getElementsByClassName('window');
        var thisId=old.length+1;

        layer.setAttribute('id','window'+thisId);
        domDoc.appendChild(layer);

        var head=domDoc.createElement('div');
        var style='';
        for(var i=0;i<headStyle.length;i++)
            style+=headStyle[i];
        head.setAttribute('style',style);

        var header=domDoc.createElement('h2');
        header.setAttribute('style','float:left; clear:left;margin: 2px auto 2px 5px; ');

        var h2Text=domDoc.createTextNode(headerText);
        header.appendChild(h2Text);

        var buttons=domDoc.createElement('div');
        buttons.setAttribute('style','float:right; clear:right; margin: 2px 2px 1px auto; ')

        var closeButton=domDoc.createElement('img');
        closeButton.setAttribute('onmouseover','this.src="../img/close_over.gif";');
        closeButton.setAttribute('onmouseout','this.src="../img/close.gif";');
        closeButton.setAttribute('onclick','CloseWindow('+thisId+');');
        closeButton.setAttribute('src','../img/close.gif');
        closeButton.setAttribute('alt','Zamknij okno');
        closeButton.setAttribute('style','cursor:pointer;');

        buttons.appendChild(closeButton);

        head.appendChild(header);
        head.appendChild(buttons);

        var cont=domDoc.createElement('div');
        var style='';
        for(var i=0;i<contStyle.length;i++)
            style+=contStyle[i];
        cont.setAttribute('style',style);
        
        
        
//        var escapeContentText=contentText.replace(/</, '&#lt;');        
//        var contText=domDoc.createTextNode(escapeContentText);
//        var contText=new XMLSerializer().serializeToString(contentText)
//        cont.appendChild(document.createTextNode('a \u003cbr /\u003e sdads'));

        var contText=domDoc.createTextNode(contentText);
        cont.appendChild(contText);

        layer.appendChild(head);
        layer.appendChild(cont);

        var str=new XMLSerializer().serializeToString(domDoc);
        document.getElementById('layersContainer').innerHTML=str;

        mint.fx.Round('window'+thisId);
        new Draggable('window'+thisId);
        
    }