function otvor_obr_okno(img)
{ 	
    picfile = new Image(); 
    picfile.src =(img); 
    kontrolaSuboru(img); 
}
function kontrolaSuboru(img)
{ 	
    if( (picfile.width!=0) && (picfile.height!=0) )
    { 
        urobOkno(img); 
    }
    else 
    {
        funzione="kontrolaSuboru('"+img+"')"; 
        intervallo=setTimeout(funzione,50); 
    }
}
function urobOkno(img)
{ 	
    ht = picfile.height + 20;
    wd = picfile.width + 20; 

    var args= "height=" + ht + ",innerHeight=" + ht;
    args += ",width=" + wd + ",innerWidth=" + wd;
    if (window.screen) 
    { 
        var avht = screen.availHeight; 
        var avwd = screen.availWidth;
        var xcen = (avwd - wd) / 2; 
        var ycen = (avht - ht) / 2;
        args += ",left=" + xcen + ",screenX=" + xcen;
        args += ",top=" + ycen + ",screenY=" + ycen + ",resizable=yes"; 	
    }
    return window.open(img, '', args); 
} 

function wopen(url, name, height, width, str1) {
       var str = "height=" + height + ",innerHeight=" + height;
       str += ",width=" + width + ",innerWidth=" + width;
	   
	   str += ", "+str1;
	   
	   
       if (window.screen) {
         var ah = screen.availHeight - 30;
         var aw = screen.availWidth - 10;

         var xc = (aw - width) / 2;
         var yc = (ah - height) / 2;

         str += ",left=" + xc + ",screenX=" + xc;
         str += ",top=" + yc + ",screenY=" + yc;
       }
       var win=window.open(url, name, str);
	   win.focus();
	   return name;
}