📄 17.12.htm
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Numbers-Only Field Mask Demo</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<script type="text/JavaScript">
<!--
function isNumberInput(field, event)
{
var key, keyChar;
if (window.event)
key = window.event.keyCode;
else if (event)
key = event.which;
else
return true;
// Check for special characters like backspace
if (key == null || key == 0 || key == 8 || key == 13 || key == 27)
return true;
// Check to see if it's a number
keyChar = String.fromCharCode(key);
if (/\d/.test(keyChar))
{
window.status = "";
return true;
}
else
{
window.status = "本区域只接受数字输入";
return false;
}
}
//-->
</script>
</head>
<body>
<center>
<h1>按键屏蔽示例</h1>
在下面的输入框中，只接受数字的输入，若输入其他字符，会被屏蔽。
<form name="testform" id="testform" action="#" method="get">
Robot Serial Number:
<input type="text" name="serialnumber" id="serialnumber"
size="10" maxlength="10"
onkeypress="return isNumberInput(this, event);" title="Serial number contains only digits">
</form>
</center>
</body>
</html>
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