isExpanded = true;

    function getItem(id)
    {
        var itm = false;
        if(document.getElementById)              //all browsers
            itm = document.getElementById(id);
        else if(document.all)                    //Opera+IE
            itm = document.all[id];
        else if(document.layers)                 //IE
            itm = document.layers[id];
        return itm;
    }

    function rozwin(id)
    {
        itm = getItem(id);
        if(!itm)
           { //alert("false");
            return false;}
        if(itm.style.display == 'none')
            {//alert("visible");
            itm.style.display = '';}
        else
            {//alert("hidden");
            itm.style.display = 'none';}
        ////////////////////
    }


function pokazWszystkie() {
isExpanded=!isExpanded;
 elementsToCheck='DIV';
 elms=document.getElementsByTagName(elementsToCheck);
 
         
    for (i=0;i<elms.length;i++)
    {
     if(elms[i].className=="iso")
     {
	 //alert(isExpanded); 
    	    if (isExpanded)
    	    {
    		elms[i].style.display =   "" ;
    	    }else{
    		elms[i].style.display =  "none";
    	    }
     }
    }



}