function link_this_page(value, idbox,idemail){
    var linkElement=document.getElementById(idbox);
    var emailElement=document.getElementById(idemail);
    
    if(linkElement!==null){
        if(value){
            linkElement.style.display="";
            emailElement.select();
        }else{
            linkElement.style.display="none";
        }
    }
}