var ns6 = document.getElementById && !document.all;
var ie4 = document.all && navigator.userAgent.indexOf("Opera") == -1;

function checkcontained(e){
  	var iscontained = 0;
  	cur = ns6 ? e.target : event.srcElement;
  	i = 0;

	if(cur.tagName == "IMG"){
		ImgButton = cur;
	}
	
    while (ns6 && cur.parentNode||(ie4 && cur.parentElement)){
		if (cur.id == "foldheader"||cur.id == "foldinglist"){
        	iscontained = (cur.id == "foldheader")? 1 : 0;
        	break;
      	}
    	cur = ns6 ? cur.parentNode : cur.parentElement;
    }
	if (iscontained){
    	var foldercontent = ns6 ? cur.nextSibling : cur.all.tags("UL")[0];
    	if (foldercontent.style.display == "none"){
      		foldercontent.style.display = "";
      		ImgButton.src = "/projects/org/Modules/redCMS_Forum2/images/default/2047/minus.gif";
    	}
    	else{
      		foldercontent.style.display = "none";
      		ImgButton.src = "/projects/org/Modules/redCMS_Forum2/images/default/2047/plus.gif";
    	}
  	}
}