function toggleDisplay(obj,img){
    if(!obj.style){obj=document.getElementById(obj);}
    if(!img.src){img=document.getElementById(img);}
	try{
		if(obj.style.display=='none'){obj.style.display='';if(img){img.src=img.src.replace('Plus','Minus');}}
		else{obj.style.display = 'none';if(img){img.src=img.src.replace('Minus','Plus');}}
	}
	catch(e){}
}