📄 web19.html
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<html>
<head>
<title>the web page is very good</title>
<script language="JavaScript">
function a()
{
var m=document.form1.text1.value;
var n=document.form1.text2.value;
var z;
z=m*1+n*1;
document.form1.text3.value=z;
}
function b()
{
var m=document.form1.text1.value;
var n=document.form1.text2.value;
var z;
z=m-n;
document.form1.text3.value=z;
}
function c()
{
var m=document.form1.text1.value;
var n=document.form1.text2.value;
var z;
z=m*n;
document.form1.text3.value=z;
}
function d()
{
var m=document.form1.text1.value;
var n=document.form1.text2.value;
var z;
z=m/n;
document.form1.text3.value=z;
}
</script>
</head>
</body>
<form name="form1">
please enter the first number:<br/>
<input type="text" name="text1"><br/>
please enter the second number:
<input type="text" name="text2"><br/>
<input type="text" name="text3">
<input type="button" onclick="a()" value="add">
<input type="button" onclick="b()" value="min">
<input type="button" onclick="c()" value="mul">
<input type="button" onclick="d()" value="div">
</body>
</html>
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