<!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>
</head>
<script type="text/javascript">
function count(){
var txt1=parselnt(document.getElementById("txt1").value);
var txt2=parselnt(document.getElementById("txt2").value);
var select=document.getElementById("select").value;
var result;
switch(select){
case "+":
result=txt1+txt2;
break;
case "-":
result=txt1-txt2;
break;
case "*":
result=txt1*txt2;
break;
case"/":
result=txt1/txt2;
break;
}
document.getElementById("fruit").value=result;
}
</script>
</head>
<body>
<input type='text' id="txt1" />
<select id='select'>
<option value='+'>+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type='text' id='txt2' />
<input type='button' value='=' onclick="count()" /> <!--通过 = 按钮来调用创建的函数，得到结果-->
<input type='text' id='fruit' />
</body>
</html>
huangzhong
CodeManDSH
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