怎么获取javascript中input标签总数

function add()
{
  var div1=document.getElementById("filelist");
   
    var  filea=document.createElement("input");
  filea.setAttribute("type","file");
  filea.setAttribute("size","40");
  filea.setAttribute("name","file5");
  filea.setAttribute("class","aa");
}
<input type='button' value="增加" onclick="add()">
当用户点击增加按钮时 创建input元素超过5个时 alert()下

注意: 我页面中己经有一个input标签元素

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document.getElementByTagname("input")
???

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用jquery最方便

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var x=document.getElementsByTagName("input");
  alert(x.length);

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function getElements()
  {
  var x=document.getElementsByTagName("input");
  alert(x.length);
  }

至于有多少个input,你自己判断吧

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jq: $("input").size();

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document.getElementsByTagName("input");

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var inputs=document.getElementsByTagName("input");
var len=inputs.length

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跟帖

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$("input").size(); jquery中实现

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JScript code

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