window.external.AddF
function bookmark(title,url){

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

function changeFontSize(tam){
    var div_main_content = document.getElementById("main-content");
    div_main_content.style.fontSize=tam+"px";

    var tables = div_main_content.getElementsByTagName("td");    
    for (var i=0; i<tables.length; i++) {
        tables[i].style.fontSize=tam+"px";
    }

    var p = div_main_content.getElementsByTagName("p");
    for (i=0; i<p.length; i++) {
        p[i].style.fontSize=tam+"px";
    }

    var h1 = div_main_content.getElementsByTagName("h1");
    for (i=0; i<h1.length; i++) {
        h1[i].style.fontSize=tam+"px";
    }

    var h2 = div_main_content.getElementsByTagName("h2");
    for (i=0; i<h2.length; i++) {
        h2[i].style.fontSize=tam+"px";
    }

    var input_ = div_main_content.getElementsByTagName("input_");
    for (i=0; i<input_.length; i++) {
        input_[i].style.fontSize=tam+"px";
    }
}