function dd(obj){

	if(document.getElementById){document.getElementById(obj).style.display=='none'?document.getElementById(obj).style.display='':document.getElementById(obj).style.display='none'}

	else if(document.all){document.all(obj).style.display=='none'?document.all(obj).style.display='':document.all(obj).style.display='none'}

	else if(document.layers){document.layers[obj].display=='none'?document.layers[obj].display='':document.layers[obj].display='none'}

}