<!DOCTYPEhtml><html><head><metacharset="UTF-8"><title>小小留言板</title></head><body><div><textareaid="trCon"cols="30"rows="8"></textarea></div><div><inputtype="button"value="发表"onclick="posCon()"/><inputtype="button"value="清除"onclick="delCon()"/></div><divid="dCon"></div><scripttype="text/javascript"src="jquery.js"></script><scripttype="text/javascript">//发表留言functionposCon(){varpv=$("#trCon").val;$("#dCon").append('<div>'+pv+'</div>');localStorage.setItem("k_con",$("#dCon").html());}//清除留言functiondelCon(){$("#dCon").html("");localStorage.clear();}//加载留言load();functionload(){varname=localStorage.getItem("k_con");if(name!=null){$("#dCon").html(name);}}</script></body></html>

不要忘记添加上jquery包