如何自定义微信分享的内容：

1、引入微信官方的库：

<script type="text/javascript" src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

2、自定义分享内容：

var WXShare={
	init:function(){
		$.post("微信分享信息的接口（返回微信appid之类微信分享需要用到的账户信息）",function(data){
			wx.config({
				debug: false,
				appId: data.appId,
				timestamp: data.timestamp,
				nonceStr: data.nonceStr,
				signature: data.signature,
				jsApiList: [
				  'checkJsApi',
				  'onMenuShareTimeline',
				  'onMenuShareAppMessage',
				  'onMenuShareQQ',
				  'onMenuShareWeibo',
				  'hideMenuItems',
				  'showMenuItems',
				  'hideAllNonBaseMenuItem'
				]
			});
			wx.ready(function(){
				WXShare.share("描述","地址（绝对地址）","logo（绝对地址）");
			});
		},"json");
	}
	,share:function(title,desc,link,pic){
		var wxData = {
			title: title,
			link: link,
			imgUrl: pic,
			desc: desc,
			success: function () {
				WXShare.end();
			},
			cancel: function () {
				WXShare.end();
			}
		}
		var wxDataTimeline = {
			title: desc,
			link: link,
			imgUrl: pic,
			success: function () {
				WXShare.end();
			},
			cancel: function () {
				WXShare.end();
			}
		}
		wx.onMenuShareTimeline(wxDataTimeline);
		wx.onMenuShareAppMessage(wxData);
		wx.onMenuShareQQ(wxData);
		wx.onMenuShareWeibo(wxData);
	},
	end:function(){
		stat("sharetowechat");
	}
};
WXShare.init();