function show_hide(xid){
	if(document.getElementById(xid).style.display==''){
		document.getElementById(xid).style.display='none';
	} else {
		document.getElementById(xid).style.display='';
	}
}
function getE(obj){
                return document.getElementById(obj);             
}
function showE(obj,par){
                if(typeof(obj)=="string")
                               obj=getE(obj);
                if(par==1)
                               obj.style.display=obj.style.display=="block"?"none":"block";
                else
                               obj.style.display="block";          
}
function hideE(obj){
                if(typeof(obj)=="string")
                               obj=getE(obj);
                obj.style.display="none";          
}