微博划词转发

var miniBlogShare = function() {
    //指定位置显示的分享图标按钮
    $('<img id="imgSinaShare" class="img_share" title="将选中内容分享到新浪微博" src="http://www.sprityaoyao.org/content/templates/ljie/images/sina_share.gif" /><img id="imgQqShare" class="img_share" title="将选中内容分享到腾讯微博" src="http://www.sprityaoyao.org/content/templates/ljie/images/tt_share.png" />').appendTo('body');
   
    //图标样式
    $('.img_share').css({
        display : 'none',
        position : 'absolute',
        cursor : 'pointer'
    });
   
    //实现选中文字
    var funGetSelectTxt = function() {
        var txt = '';
        if(document.selection) {
            txt = document.selection.createRange().text;
        } else {
            txt = document.getSelection();
        }
        return txt.toString();
    };
   
    //实现选中文字后显示微博分享图标
    $('html,body').mouseup(function(e) {
        if (e.target.id == 'imgSinaShare' || e.target.id == 'imgQqShare') {
            return
        }
        e = e || window.event;
        var txt = funGetSelectTxt(),
            sh = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0,
            left = (e.clientX - 40 < 0) ? e.clientX + 20 : e.clientX - 40,
            top = (e.clientY - 40 < 0) ? e.clientY + sh + 20 : e.clientY + sh - 40;
        if (txt) {
            $('#imgSinaShare').css({
                display : 'inline',
                left : left,
                top : top
            });
            $('#imgQqShare').css({
                display : 'inline',
                left : left + 30,
                top : top
            });
        } else {
            $('#imgSinaShare').css('display', 'none');
            $('#imgQqShare').css('display', 'none');
        }
    });
    function getParamsOfShareWindow(width, height) {
        //弹窗代码
        return ['toolbar=0,status=0,resizable=1,width=' + width + ',height=' + height + ',left=', (screen.width - width) / 2, ',top=', (screen.height - height) / 2].join('');
    }
   
    //点击新浪微博
    $('#imgSinaShare').click(function() {
        var txt = funGetSelectTxt(), title = $('title').html();
        var params = getParamsOfShareWindow(607, 523);
        if (txt) {
            window.open('http://v.t.sina.com.cn/share/share.php?title=' + txt + ' —— 转载自：' + title + '&url=' + window.location.href,'share',params);
        }
    });
   
    //点击腾讯微博
    $('#imgQqShare').click(function() {
        var txt = funGetSelectTxt(), title = $('title').html();
        var params = getParamsOfShareWindow(642, 468);
        if (txt) {
            window.open('http://v.t.qq.com/share/share.php?title=' + encodeURIComponent(txt + ' —— 转载自：' + title) + '&url=' + window.location.href,'share',params);
        }
    });
}();

   //实现选中文字
    var funGetSelectTxt = function() {
        var txt = '';
        if(document.selection) {
            txt = document.selection.createRange().text;
        } else {
            txt = document.getSelection();
        }
        return txt.toString();
    };

选中的文字