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Example code for using JS to allow only numbers to be entered in the text box
- 怪我咯Original
- 2017-04-01 09:34:121200browse
How to implement that the text box can only input numbers (compatible with IE Firefox)
<!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" type="text/javascript">
//注意：火狐使用event时，
function inputNum(evt){
//火狐使用evt.which获取键盘按键值，IE使用window.event.keyCode获取键盘按键值
var ev = evt.which?evt.which:window.event.keyCode;
if(ev>=48&&ev<=57){
return true;
}else{
return false;
}
}
</script>
</head>
<body>
<input type="text" onKeyPress="return inputNum(event);" >
</body>
</html
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