function showhid(id1,id2)
{
	var idm = document.getElementById(id1);		//must show
	var idn = document.getElementById(id2);		//must hid
	
	idm.style.display = '';
	idn.style.display = 'none';
	//--------------------------------

}

function openwin(arg,cat)
{
	var name;
	var w,h;
	var option;
	if(!cat == '')					// open window for view or download files
	{
		w = 700;
		h = 500;
		var strUrl = 'view.asp?arg=' + arg + '&cat=' + cat;
		
	}else if(cat == '')				// open window for send mail
	{
		w = 350;
		h = 250;
		var strUrl = 'mail.asp?arg=' + arg;
	}
	
	option = 'toolbar=no,location=no,status=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width='+w+',height='+h;
	window.open(strUrl,name,option);
}