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>
</htmlThe above is the detailed content of Example code for using JS to allow only numbers to be entered in the text box. For more information, please follow other related articles on the PHP Chinese website!
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