我试图用4个文本类型求和4个条目的总和,但一切都很好,除了单击按钮时,它不会设置总和。就像我在每个文本输入中输入1一样,总和的文本输入应显示为4。谢谢!
这是我的Javascript代码:
(function(){
var oForm = document.forms;
oForm[2].querySelector("input[type='button']").
addEventListener("click",
sommeValeur,
false);
}) ()
function sommeValeur() {
var aTxt = document.forms[0].tEx1;
var total = document.forms[0].tEx2;
var txt1 = aTxt[0].value;
var txt2 = aTxt[1].value;
var txt3 = aTxt[2].value;
var txt4 = aTxt[3].value;
total = parseInt(txt1) + parseInt(txt2) + parseInt(txt3) + parseInt(txt4) ;
return true;
}
这是我的html代码:
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="css/form.css" />
</head>
<body>
<section>
<form name="frm1">
<label> Valeur 1:
<input type="text" name="tEx1" />
</label>
<label> Valeur 2:
<input type="text" name="tEx1" />
</label>
<label> Valeur 3:
<input type="text" name="tEx1" />
</label>
<label> Valeur 4:
<input type="text" name="tEx1" />
</label>
</form>
</section>
<section>
<form name="frm2">
<label> Somme:
<input type="text" name="tEx2" />
</label>
</form>
</section>
<section>
<form name="frm3">
<label>
<input type="button"
value="bouton"
name="btn1" /></br>
</label>
</form>
</section>
</body>
<script src="js/exercise4.js"></script>
</html>
最佳答案
看起来您输入的total是第二种形式,因此您需要form[1]
,并且还需要使用total.value
来设置值:
var total = document.forms[1].tEx2;
...
total.value = parseInt(txt1) + parseInt(txt2) + parseInt(txt3) + parseInt(txt4) ;
现场示例:
(function(){
var oForm = document.forms;
oForm[2].querySelector("input[type='button']").
addEventListener("click",
sommeValeur,
false);
}) ()
function sommeValeur() {
var aTxt = document.forms[0].tEx1;
var total = document.forms[1].tEx2;
var txt1 = aTxt[0].value;
var txt2 = aTxt[1].value;
var txt3 = aTxt[2].value;
var txt4 = aTxt[3].value;
total.value = parseInt(txt1) + parseInt(txt2) + parseInt(txt3) + parseInt(txt4) ;
return true;
}
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="css/form.css" />
</head>
<body>
<section>
<form name="frm1">
<label> Valeur 1:
<input type="text" name="tEx1" />
</label>
<label> Valeur 2:
<input type="text" name="tEx1" />
</label>
<label> Valeur 3:
<input type="text" name="tEx1" />
</label>
<label> Valeur 4:
<input type="text" name="tEx1" />
</label>
</form>
</section>
<section>
<form name="frm2">
<label> Somme:
<input type="text" name="tEx2" />
</label>
</form>
</section>
<section>
<form name="frm3">
<label>
<input type="button"
value="bouton"
name="btn1" /></br>
</label>
</form>
</section>
</body>
</html>
关于javascript - 用4个值和一个按钮求和,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/36046717/