在两个输入框中输入数字,例如8和3,乘法可以正常运算,输出24,而加法就会输出83.代码如下:<!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">
window.onload = function math(){
x = document.form1.fvalue;
i = document.form1.svalue;
z = document.getElementById("link");
z.onclick = function(){
alert(x.value+i.value);
}
}
</script>
</head><body>
<form name="form1">
<input type="text" name="fvalue" size="10" />+<input type="text" name="svalue" size="10" />=
<a id="link">结果</a>
</form>
</body>
</html>
<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">
window.onload = function math(){
x = document.form1.fvalue;
i = document.form1.svalue;
z = document.getElementById("link");
z.onclick = function(){
alert(x.value+i.value);
}
}
</script>
</head><body>
<form name="form1">
<input type="text" name="fvalue" size="10" />+<input type="text" name="svalue" size="10" />=
<a id="link">结果</a>
</form>
</body>
</html>
<!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">
window.onload = function math(){
x = document.form1.fvalue;
i = document.form1.svalue;
z = document.getElementById("link");
//取到的value是字符串类型,乘法时会自动转换为字符型,但加法时 直接就是字符串相加了
z.onclick = function(){
alert(parseFloat(x.value, 10) + parseFloat(i.value, 10));
}
}
</script>
</head><body>
<form name="form1">
<input type="text" name="fvalue" size="10" />+<input type="text" name="svalue" size="10" />=
<a id="link">结果</a>
</form>
</body>
</html>