点击按钮添加下拉框文本框运用jquery

本文引用

http://www.freejs.net/article_biaodan_278.html

所需插件jquery-3.3.1.js

链接：https://pan.baidu.com/s/14vEP5NvhnMk2vyWSTXXjlA
提取码：eeuc

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>选项</title>

<script type="text/javascript" src="js/jquery-3.3.1.js"></script>

<script>  
$(document).ready(function() {  
  
var MaxInputs       = 5; //maximum input boxes allowed  
var InputsWrapper   = $("#InputsWrapper"); //Input boxes wrapper ID  
var AddButton       = $("#AddMoreFileBox"); //Add button ID  
  
var x = InputsWrapper.length; //initlal text box count  
var count=0; //to keep track of text box added  
  
$(AddButton).click(function (e)  //on add input button click  
{  
        if(x <= MaxInputs) //max input box allowed  
        {  
            count++; //text box added increment  
            //add input box  
            $(InputsWrapper).append('<div><td><input type="button" value="—"class="removeclass"></td><td><select name="diaochaname'+ count +'" style="width:200px;height:26px"	><option value="ptmc">平台名称</option><option value="pzrq">调查年度</option><option value="name" selected>填表人</option></select></td><td><input type="text" name="name'+ count +'" /></td></div>');  
            x++; //text box increment  
        }  
return false;  
});  
  
$("body").on("click",".removeclass", function(e){ //user click on remove text  
        if( x > 1 ) {  
                $(this).parent('div').remove(); //remove text box  
                x--; //decrement textbox  
        }  
return false;  
})   
  
});  
</script>

<style>
* {
	margin: 0px;
	padding: 0px;
}

#dv {
	width: 100px;
	height: 100px;
	background-color: yellow;
	margin: 0px auto 0px;
}
</style>
</head>
<body>

	<form action="ChaxunServlet?method=search" method="post">
		<div >

			<tr>
				<td><input type="button" 
					class="btn btn-info" value="＋"></td>
				<td colspan="2"><select name="diaochaname"
					style="width: 200px; height: 26px">
						<option value="ptmc">平台名称</option>
						<option value="pzrq">调查年度</option>
						<option value="name" selected>填表人</option>

				</select></td>
				<td colspan="2"><input type="text" name="name"
					style="width: 300px; height: 26px" /></td>

			</tr>

		</div>
		<td><input type="submit" name="Submit" value="搜索"
			style="width: 50px; height: 26px"></td>
	</form>
</body>
</html>

　　点击按钮添加下拉框文本框运用jquery