<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">javascript
<html xmlns="http://www.w3.org/1999/xhtml">html
<head>java
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><!-- 寫utf-8是亂碼? -->ide
<title>文本框只能輸入數字</title>ui
<script language="javascript" type="text/javascript"> xml
//注意:火狐使用event時, htm
function inputNum(evt){ ip
//火狐使用evt.which獲取鍵盤按鍵值,IE使用window.event.keyCode獲取鍵盤按鍵值utf-8
var ev = evt.which?evt.which:window.event.keyCode;input
if(ev>=48&&ev<=57){
return true;
}else{
return false;
}
}
</script>
</head>
<body>
<input type="text" onKeyPress="return inputNum(event);" >
</body>
</html>