//
function Counter(field, countfield, maxlimit) 
{           
    //alert (maxlimit);
    if (field.value.length > maxlimit)	{	            
            field.value = field.value.substring(0, maxlimit);
    }            
    else { 
            countfield.value = maxlimit - field.value.length;
    }//end if
}//end Counter
//
function NavigateURL(url){
    location.href = url;
}//
//
function clearTextbox(objid){
    
    var obj = document.getElementById (objid);
    obj.value = "";
    obj.style["color"] = "#000";
}//end clearTextbox
//

////////////////////////////////////
// add favorite page
function CreateBookmarkLink() { 
    title = "Trang vàng địa ốc";
    url = "http://trangvangdiaoc.com";
    //
    if (window.sidebar) { // Mozilla Firefox Bookmark		
        window.sidebar.addPanel(title, url,"");	
    }else if( window.external ) { // IE Favorite		
        window.external.AddFavorite( url, title); 
    }else if(window.opera && window.print) { // Opera Hotlist		
        return true; 
    }//end if
}//end CreateBookmarkLink