<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script language="javascript" src="jquery-2.1.1.min.js"></script>
</head>
<body>
<input type="text" id="txt1" onfocus="a1()"/>
<select id="sel">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="text" id="txt2" onfocus="a2()"/>
<input type="button" id="btn" value="=" onclick="aa()"/>
<input type="text" id="txt3"/>
<script>
function a1(){
document.getElementById("txt1").value="请输入整数";
}
function a2(){
document.getElementById("txt2").value="请输入整数";
}
function aa(){
if($t1!=null && $t2!=null ){
var $t1=parseInt(document.getElementById("txt1").value);
var $t2=parseInt(document.getElementById("txt2").value);
var $t3;
var ss=document.getElementById("sel").value;
switch(ss){
case "+":
$t3=$t1+$t2;
break;
case "-":
$t3=$t1-$t2;
break;
case "*":
$t3=$t1*$t2;
break;
case "/":
$t3=$t1/$t2;
break;
}
document.getElementById("txt3").value=$t3;
}
else
{
alert("您还没有输入数值！");
}
}
</script>
</body>
</html>
Aa123456_0002
2014-10-22
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