How to add Twitter Bootstrap in joomla 3.0

JHtml::_('jquery.framework'); //jquery for joomla 3.0
JHtml::_('bootstrap.framework'); // how to add twitter bootstrap in joomla

$image.= '<div class="cbresponsivefbpgkstrmbsimg" style="float:left;margin:2px 5px 0 5px;'.$leftmarginstyle.'">';
     $image.= '<div class="cbresponsivefbpgkstrmphoto" style="">';
    $image.=   '<a style="cursor:pointer;" class="cbrfbstrmimg cbresponsivefbpgkstrmanchor tbpop" href="' .       (($pinopen == 'pop') ? '#' : $anchorhref ) . '" target="_blank" '.$tooltipattr.'  data-target="#cbresponsivefbpgkstrm'.$itemkey.'img'.$thumbindex.'" iframesrc="" vidhost="">';
            //$image.=       '<div style="max-width:'.$thimbdimension.'px;" >';
            $image.=           '<img style="max-width:'.$thimbdimension.'px;" class="cbresponsivefbpgkstrmitemthumb" src="' . $imgsrc . '" alt="fbthumb" />';
            //$image.=       '</div>';
            $image.=   '</a>';
            $image.= '</div>';

            if($pinopen == 'pop' && $tooltipimg){
                //$image.= '<div style="margin:2px 5px 0 0;">';style="width:auto; margin-left:-150px;"
                $image .= '<div id="cbresponsivefbpgkstrm'.$itemkey.'img'.$thumbindex.'" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" style="display:none;max-width:500px;width:auto;">';
                $image .=    '<div class="modal-header">';
                $image .=         '<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button><div style="clear:both;"></div>';
                $image .=    '</div>';
                $image .=    '<div class="modal-body" style="overflow:hidden;">';
                $image .=        '<img style="" src="'.$tooltipimg.'" />';
                $image .=    '</div>';
                $image .=    '<div class="modal-footer">';
                $image .=       '<button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>';
                $image .=    '</div>';
                $image .= '</div>';
                //$image .= '</div>';
            }

        $image .= '</div>';

//javascript for adding modal
if($pinopen == 'pop'){
            $modaljs = 'jQuery(document).ready(function(){
                            jQuery("a.cbresponsivefbpgkstrmanchor").click(function(event){
                                event.preventDefault();
                                var id = jQuery(this).data("target");
                                jQuery(id).modal();
                                //console.log(id);
                            });
                            '.$bsmodaljs.'
                        });';

            $doc->addScriptDeclaration($modaljs);
        }