Anchor not removed when using QTextBrowser::setText()

#include <QtGui>
#include <Dialog.h>

Dialog::Dialog()
{
    QDialog* dialog = new QDialog();
    _text = new QTextBrowser(dialog);
    connect(_text, SIGNAL(anchorClicked ( const QUrl &)), this, SLOT(clicked()));
    _text->setHtml("This is an <a href=\"http://www.w3schools.com/HTML/html_links.asp\">Anchor<\a>");
    dialog->show();
}

void Dialog::clicked()
{
    _text->setText("No Anchor");
}