function setHalign($halign)
    {
        $old = $this->halign;
        $this->halign = $halign;
        $this->onAlign($old, $this->valign);
    }
function setHalign($halign)
    {
        $old = $this->halign;
        $this->halign = $halign;
        $this->onAlign($old, $this->valign);
    }
function setHalign ( $ halign ) { $ old = $ this -> halign ; $ this -> halign = $ halign ; $ this -> onAlign ( $ old , $ this -> valign ) ; }
Sets the horizontal alignment of the element
@param string Horizontal alignement can be eithe "left", "center" or
"right"
Sets the horizontal alignment of the element