// 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 ;

};