JS 微博，人人，腾讯微博直接分享

function sharesina() {
    window.open("http://service.weibo.com/share/mobile.php?&title=&pic=&url=");
}

function shareqq() {
    window.open("http://share.v.t.qq.com/index.php?c=share&a=index&url=&appkey=&assname=&title=&pic=");
}

function sharerenren() {
    window.open("http://widget.renren.com/dialog/forward?api_key=&url=&title=&images=&content=");
}