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jQuery dynamically adds

高洛峰
高洛峰Original
2017-02-11 17:03:461628browse

Sometimes it is necessary to allow users to upload multiple files on the page. The number is determined by the user. If the number is too large, it can be deleted. This function can be easily achieved using jQuery.

Let me show you the renderings first:

jQuery动态添加<input type=" width="374" style="max-width:90%" title="jQuery动态添加"/>

<!DOCTYPE html>
<html>
<head>
<title>test.html</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="jquery-1.6.4.min.js"></script>
<script type="text/javascript">
//添加一行<tr>
function add() {
var content = "<tr><td>";
content += "<input type=&#39;file&#39; name=&#39;file&#39;><input type=&#39;button&#39; value=&#39;Remove&#39; onclick=&#39;remove(this)&#39;>";
content +="</td></tr>"
$("#fileTable").append(content);
}
//删除当前行<tr>
function remove(obj) {
$(obj).parent().parent().remove();
}
</script>
</head>
<body>
<form id="fileForm" action="" method="post" enctype="multipart/form-data">
<table id="fileTable">
<tr>
<td>
<input type="file" name="file"><input type="button" id="addButon" value="Add" onclick="add()">
</td>
</tr>
</table>
</form>
</body>
</html>

Introducing various ways for JQuery to obtain the value in input type="text"

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JQuery获取文本框的值</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<script src="jquery-1.5.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
//使用id的方式获取
$(document).ready(function(){
//1
$("#button_text1").click(function(){
var result1 = $("#input_text1").val();
alert("result1 = " + result1);
});
//2
$("#button_text2").click(function(){
var result2 = $("input[id=&#39;input_text2&#39;]").val();
alert("result2 = " + result2);
});
//3
$("#button_text3").click(function(){
var result3 = $("input[id=&#39;input_text3&#39;]").attr("value");
alert("result3 = " + result3);
});
//4. 可以通过type的值来获取input中的值（未演示）
/*
$("#button_text4").click(function(){
var result4 = $("input[type=&#39;text&#39;]").val();
alert("result4 = " + result4);
});
*/
//5. 可以通过name的值来获取input中的值（未演示）
/*
$("#button_text5").click(function(){
var result5 = $("input[name=&#39;text&#39;]").val();
alert("result5 = " + result5);
}); 
*/
});
</script>
</head>
<body>
<!-- 获取文本框的值：方式一 -->
<p id="test1">
<input id="input_text1" type="text" value="test1" style="width: 100px;" />
<button id="button_text1">test1</button>
</p>
<!-- 获取文本框的值：方式二 -->
<p id="test2">
<input id="input_text2" type="text" value="test2" style="width: 100px;" />
<button id="button_text2">test2</button>
</p>
<!-- 获取文本框的值：方式三 -->
<p id="test3">
<input id="input_text3" type="text" value="test3" style="width: 100px;" />
<button id="button_text3">test3</button>
</p>
</body>
</html>

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