<!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>示范例子</title>
<script type="text/javascript"> function setget()
{
var a=0;
var a=a+1;
document.getElementById("text1").value=a;
setTimeout("setget()",1000);
}
</script>
</head><body>
<input id="text1" type="text" name="goe" value="0" size="4" />
<script type="text/javascript">
setget();
</script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>示范例子</title>
<script type="text/javascript"> function setget()
{
var a=0;
var a=a+1;
document.getElementById("text1").value=a;
setTimeout("setget()",1000);
}
</script>
</head><body>
<input id="text1" type="text" name="goe" value="0" size="4" />
<script type="text/javascript">
setget();
</script>
</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>示范例子</title>
<script type="text/javascript">
var a=0;
function setget()
{a=a+1;
document.getElementById("text1").value=a;
setTimeout("setget()",1000);
}
</script>
</head><body>
<input id="text1" type="text" name="goe" value="0" size="4" />
<script type="text/javascript">
setget();
</script>
</body>
</html>局部 全局变量 楼主得区分一下
var a=0;
var a=a+1;
因为a=0,a+1永远等于1吖。
使用a++
var a=0;
var a=a+1;
那a肯定都是1了。把a弄成全局的