function cHkemail(v){var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;if (!v.match(re)){return false;}else{return true;}}
function doLogin(f){
	if(!cHkemail(f.Email.value)){
		alert("Vui lòng nhập Email.");
		f.Email.focus();
		return false;
	}
	if(f.Password.value==""){
		alert("Vui lòng nhập password.");
		f.Password.focus();
		return false;
	}
	f.action="?login";
	f.submit();
}
function swmenu(id){
	if(document.getElementById){
	var el = document.getElementById("sub"+id);
	var ar = document.documentElement.getElementsByTagName(div);
  for (var i=0; i<ar.length; i++){
  if ((ar[i].className=="submenu")&&(ar[i]!=el)){ar[i].style.display=none;}
  }
	if(el){ 
		if(el.style.display != "block"){ 
			el.style.display = "block";
			document.cookie="switchmenu=sub"+id;
		}else{
			el.style.display = "none";
			document.cookie="switchmenu=";
		}
	}else{document.location.href="?p="+id}
	}
}
function search(f){
	if(f.key.value==''){
		alert("Vui lòng khóa tìm kiếm.");
		f.key.focus();
		return false;
	}
	f.action="?s";
	f.submit();
}
function getcookie(Name){ 
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) { 
offset += search.length
end = document.cookie.indexOf(";", offset);
if (end == -1) end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}

function onloadfunction(){
var cookievalue=getcookie("switchmenu");
var el = document.getElementById(cookievalue);
if (el){el.style.display = "block";}
}
window.onload=onloadfunction;