<strong>JAVA中有一个StringBuffer类，js中却没有下面来自己实现一个简单的js的StringBuffer类。</strong>        //创建一个StringBuffer类 ，此类有两个方法：一个是append方法一个是toString方法function StringBuffer() {	this.__strings__ = [];};StringBuffer.prototype.append = function(str) {	this.__strings__.push(str);};StringBuffer.prototype.toString = function() {	return this.__strings__.join('');};

function GnComCard(companymsg) {var buffer = new StringBuffer();//声明一个对象	buffer.append('<li>');//追加字符串，下同	buffer.append('<div class="com_photo"><a href="#" title="用户头像"><img class="userPhoto" src="');	buffer.append(companymsg.userPhoto);	buffer.append('"></img></a></div>');	buffer.append('<div class="com_msg">');	buffer.append('<div><a class="com_comname">'+ companymsg.companyMasterName+ '</a> <span class="com_time">'	+ FormatDate(companymsg.crtime) + '</span></div>');	buffer.append('</div><div class="news">');	if (companymsg.newsId != null) {buffer.append('<a href="'+companymsg.newsId+'" title="新闻动态" class="com_newsname">'+ companymsg.newsTitle + '</a>');	} else {buffer.append('<a href="javascript:void(0)" class="com_newsname">'+ companymsg.newsTitle + '</a>');	}	if (companymsg.newsContent != null) {buffer.append('<div class="com_sh"><span class="toggle">>>展开</span></div>');buffer.append('<div class="com_newscontent">'+ companymsg.newsContent + '</div>');	}	buffer.append('</div>');	buffer.append('<div class="comment"><a href="javascript:void(0)" style="float:left" title="追踪公司"><span class="track"></span></a><input type="text"></input></div>');	buffer.append('</div></li>');	return buffer.toString();//拼接成一个字符串}