5月14日项目小结-获取与增加html节点

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function chuanruwenzi(){
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      if($("#wenzi").val().length>0){
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        inum = document.getElementById("ChatContent").getElementsByTagName("li").length;//现节点长度
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        if(inum==0) {
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          snum =inum+1;
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          var xin= "#xinxi"+snum;
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          var xinnew = "xinxi"+snum;
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          var xinnews = "#xinxi"+snum;
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          var neinew = "neirong"+snum;
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//增加新节点
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          $("#chushi").after("<li id='"+xinnew+"'class='neirong_zili'><img class='touimg' src="https://windcoder.com/+img+"><span id='"+neinew+"' class='neirong'>"+$("#wenzi").val()+"</span></br></li>");
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          var s = document.getElementById(neinew).offsetHeight-90;
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          $(xinnews).css("padding-bottom",s);
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          //清空输入框
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          var textarea=document.getElementById("wenzi");
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          textarea.value=" ";
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        }else {
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          snum =inum+1;
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          var xin= "#xinxi"+inum;
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          var xinnew = "xinxi"+snum;
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          var xinnews = "#xinxi"+snum;
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          var nei = "neirong"+inum;
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          var neinew = "neirong"+snum;
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//增加新节点
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          $(xin).after("<li id='"+xinnew+"'class='neirong_zili'><img class='touimg' src="https://windcoder.com/+img+"><span id='"+neinew+"' class='neirong'>"+$("#wenzi").val()+"</span></br></li>");
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          var s = document.getElementById(neinew).offsetHeight-90;
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          $(xinnews).css("padding-bottom",s);
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          //清空输入框
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          var textarea=document.getElementById("wenzi");
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          textarea.value=" ";
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        }
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      }
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      window.scrollTo(0,document.body.scrollHeight);
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    }