5月14日项目小结-获取与增加html节点

<div id="xiaoxi" style="font-size: 30px;position: absolute;z-index:8;width: 100%;">
    <ul id="ChatContent">
        <span id="chushi"></span>
    </ul>
    <div style="height: 100px"></div>
</div>

		function chuanruwenzi(){
			if($("#wenzi").val().length>0){
				inum = document.getElementById("ChatContent").getElementsByTagName("li").length;//现节点长度
				if(inum==0) {
					snum =inum+1;

					var xin= "#xinxi"+snum;
					var xinnew = "xinxi"+snum;
					var xinnews = "#xinxi"+snum;
					var neinew = "neirong"+snum;
//增加新节点
					$("#chushi").after("<li id='"+xinnew+"'class='neirong_zili'><img class='touimg' src="+img+"><span id='"+neinew+"' class='neirong'>"+$("#wenzi").val()+"</span></br></li>");
					var s = document.getElementById(neinew).offsetHeight-90;
					$(xinnews).css("padding-bottom",s);
					//清空输入框
					var textarea=document.getElementById("wenzi");
					textarea.value=" ";
				}else {
					snum =inum+1;
					var xin= "#xinxi"+inum;
					var xinnew = "xinxi"+snum;
					var xinnews = "#xinxi"+snum;
					var nei = "neirong"+inum;
					var neinew = "neirong"+snum;
//增加新节点
					$(xin).after("<li id='"+xinnew+"'class='neirong_zili'><img class='touimg' src="+img+"><span id='"+neinew+"' class='neirong'>"+$("#wenzi").val()+"</span></br></li>");
					var s = document.getElementById(neinew).offsetHeight-90;
					$(xinnews).css("padding-bottom",s);
					//清空输入框
					var textarea=document.getElementById("wenzi");
					textarea.value=" ";
				}
			}

			window.scrollTo(0,document.body.scrollHeight);

		}

<li id="xinxi1" class="neirong_zili "><img class="touimg" src="img/ceshi/tou.jpg"><span id="neirong1" class="neirong">文本</span></li>

			.none {display: none;}
			/*背景*/
			.bg {width: 100%;height: 100%;top: 0;position: absolute;}
			/*居中*/
			.center {position: absolute;left: 0;right: 0;margin: auto;z-index: 8;}
			.touimg{width: 15%;border-radius:40px;}
			.neirong{width: 46%;position: absolute;padding-left: 2%;background-color: #B1E766;padding: 10px;margin-left: 15px;border-radius:20px;min-height: 65px}
			.neirong_zili{position: relative;padding-bottom: 3%;}
			.neirong_imgli{position: relative;padding-bottom: 27%;}
			.neirong_img{width: 46%;position: absolute;padding-left: 2%;height: auto;}
			li{list-style-type: none;}