// Check xem trình duyệt là IE6 hay IE7
var isIE		= (navigator.userAgent.toLowerCase().indexOf("msie") == -1 ? false : true);
var isIE6	= (navigator.userAgent.toLowerCase().indexOf("msie 6") == -1 ? false : true);
var isIE7	= (navigator.userAgent.toLowerCase().indexOf("msie 7") == -1 ? false : true);
var ie45,ns6,ns4,dom;
if (navigator.appName=="Microsoft Internet Explorer") ie45=parseInt(navigator.appVersion)>=4;
else if (navigator.appName=="Netscape"){  ns6=parseInt(navigator.appVersion)>=5;  ns4=parseInt(navigator.appVersion)<5;}
dom=ie45 || ns6;

function getobj(id) {
	el =  document.getElementById(id);
	return el;
}
function showobj(id) {
obj=getobj(id);
els = dom ? obj.style : obj;
 	if (dom){
	    els.display = "";
    } else if (ns4){
        els.display = "show";
  	}
}

function hideobj(id) {
obj=getobj(id);
els = dom ? obj.style : obj;
 	if (dom){
	    els.display = "none";
    } else if (ns4){
        els.display = "hide";
  	}
}
// khong the phong to cua so
function openPopUp(url, windowName, w, h, scrollbar) {
   var winl = (screen.width - w) / 2;
   var wint = (screen.height - h) / 2;
   winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scrollbar ;
   win = window.open(url, windowName, winprops);
   if (parseInt(navigator.appVersion) >= 4) { 
       	win.window.focus(); 
   } 
}

// co the phong to cua so
var win=null;
function NewWindow(mypage,myname,w,h,scroll,pos){
if(pos=="random"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
if(pos=="center"){LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;}
else if((pos!="center" && pos!="random") || pos==null){LeftPosition=0;TopPosition=20}
settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=yes';
win=window.open(mypage,myname,settings);}

// is_num
function is_num(event,f){
	if (event.srcElement) {kc =  event.keyCode;} else {kc =  event.which;}
	if ((kc < 47 || kc > 57) && kc != 8 && kc != 0) return false;
	return true;
}

// bookmarksite 
function bookmarksite(title,url){
	if (window.sidebar) // firefox
		window.sidebar.addPanel(title, url, "");
	else if(window.opera && window.print){ // opera
		var elem = document.createElement('a');
		elem.setAttribute('href',url);
		elem.setAttribute('title',title);
		elem.setAttribute('rel','sidebar');
		elem.click();
	} 
	else if(document.all)// ie
		window.external.AddFavorite(url, title);
}

// setHomepage 
function setHomepage(url)
{
	if (document.all)	{
		document.body.style.behavior='url(#default#homepage)';
		document.body.setHomePage(url);	
	}
	else if (window.sidebar)
	{
		if(window.netscape)
		{
			try			{
			netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
			}
			catch(e)			{
			alert("this action was aviod by your browser if you want to enable please enter about:config in your address line,and change the value of signed.applets.codebase_principal_support to true");
			}
		}
		var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components. interfaces.nsIPrefBranch);
		prefs.setCharPref('browser.startup.homepage',url);
	}
} 

 
/*--------------- Link advertise ----------------*/
 window.rwt = function (obj, type, id) {
	try {
		if (obj === window) {
			obj = window.event.srcElement;
			while (obj) {
				if (obj.href) break;
				obj = obj.parentNode
			}
		}		 
		obj.href = ROOT+'?'+cmd+'=mod:advertise|type:'+type+'|lid:'+id;
		obj.onmousedown = ""
	} catch(o) {}
	return true ;
};