function check_searchform(str)
	{
		if (str.value=='')
		{
			alert("Bạn chưa nhập nội dung tìm kiếm");
			str.focus;
			return false;
		}
		return true;
	}

	function check_loginform() {
        var Check = 0;
        if (document.LOGIN.user.value == '') { Check = 1; }
        if (document.LOGIN.pass.value == '') { Check = 1; }
        if (document.LOGIN.user.value == ' TÊN TRUY CẬP') { Check = 1; }
        if (document.LOGIN.pass.value == ' MẬT KHẨU') { Check = 1; }

        if (Check == 1) {
            alert("Bạn chưa nhập đầy đủ Tên Truy Cập & Mật Khẩu");
            return false;
        } else {
            document.LOGIN.submit.disabled = true;
            return true;
        }
    }

	function do_download(str){
		window.open(str,"Downloading","status=0,toolbar=0,menubar=0,resizable=0,location=0, width=50,height=50");
	}

	window.status=":: Hoàng Đức Huy ::";

// Open / Close Table
	function getCookie(name) {
	  var dc = document.cookie;
	  var prefix = name + "=";
	  var begin = dc.indexOf("; " + prefix);
	  if (begin == -1) {
	    begin = dc.indexOf(prefix);
	    if (begin != 0) return null;
	  } else
	    begin += 2;
	  var end = document.cookie.indexOf(";", begin);
	  if (end == -1)
	    end = dc.length;
	  return unescape(dc.substring(begin + prefix.length, end));
	}

	function getObj(name)
	{
	  if (document.getElementById)
	  {
	    if(document.getElementById(name))
	      return document.getElementById(name);
	    else
	      return false;
	  }
	  else if (document.all)
	  {
		if (document.all[name])
	      return document.all[name];
	    else
	      return false;
	  }
	  else if (document.layers)
	  {
	    if (document.layers[name])
	      return document.layers[name];
	    else
	      return false;
	  }
	}

	function ColumnClose(currMenu) {
		Mclose = 'menucloseds';
		Mcontent= 'menucontents';
		if (currMenu == 'menudx') {
				Mclose = 'menuclosedr';
				Mcontent = 'menucontentr';
		}

	  holder = getObj(currMenu)
	  if( holder ){

	    if (typeof(window.opera) == 'undefined'
	        && typeof(holder.getAttribute) != 'undefined') {
	        if (holder.getAttribute("className")) {
	            holder.setAttribute("className", Mclose);
	        } else {
	            holder.setAttribute("class", Mclose);
	        }
	    }
	    else {
	        holder.setAttribute("class", Mclose);
	    }

	    obj = getObj(Mcontent);
	    if(obj) obj.style.display = 'none';

	    obj = getObj(Mclose);
	    if(obj) obj.style.display = '';
	  }
	}
	function ColumnOpen(currMenu) {
	  	Mclose = 'menucloseds';
		Mcontent= 'menucontents';
		if (currMenu == 'menudx') {
				Mclose = 'menuclosedr';
				Mcontent = 'menucontentr';
		}
	  holder = getObj(currMenu)
	  if( holder ){


	    if (typeof(window.opera) == 'undefined'
	        && typeof(holder.getAttribute) != 'undefined') {
	        if (holder.getAttribute("className")) {
	            holder.setAttribute("className", currMenu);
	        } else {
	            holder.setAttribute("class", currMenu);
	        }
	    }
	    else {
	        holder.setAttribute("class", currMenu);
	    }


	    obj = getObj(Mcontent);
	    if(obj) obj.style.display = '';

	    obj = getObj(Mclose);
	    if(obj) obj.style.display = 'none';
	  }
	}


	function MemoPos(name, value) {
	   var expire=new Date();
	   expire=new Date(expire.getTime()+7776000000);
	   document.cookie=  name + "=" +value + "; expires="+expire+"; path=/";

	}

	function GetPos() {
		var resultsx = getCookie('MKmenusx');
		var resultdx = getCookie('MKmenudx');
		//document.write(result);
		if (resultsx == 1)
		ColumnClose('menusx');
		if (resultdx == 1)
		ColumnClose('menudx');

	}


/*
document.onmouseover = function ( e ) {   
if ( !e ) e = window.event;   
var el = e.target ? e.target : e.srcElement;   
while ( el != null && el.tagName != "A" ) el = el.parentNode;   
if ( el == null ) return;   
if ( e.preventDefault ) e.preventDefault();   
else e.returnValue = true;};

var clickmessage="Hình ảnh đã được bảo vệ\nLiên Minh Computer";
function disableclick(e) {
 if (document.all) {
 if (event.button==2||event.button==3) {
 if (event.srcElement.tagName=="IMG"){
 alert(clickmessage);
 return false;
 }
 }
 }
 else if (document.layers) {
 if (e.which == 3) {
 alert(clickmessage);
 return false;
 }
 }
 else if (document.getElementById){
 if (e.which==3&&e.target.tagName=="IMG"){
 alert(clickmessage)
 return false
 }
 }
 }function associateimages(){
 for(i=0;i<document.images.length;i++)
 document.images[i].onmousedown=disableclick;
 }if (document.all)
 document.onmousedown=disableclick
 else if (document.getElementById)
 document.onmouseup=disableclick
 else if (document.layers)
 associateimages()
*/