<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>限定输入
</title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
input{
display: block;
width: 300px;
height: 30px;
margin: 60px auto;
}
</style>
</head>
<body>
<input type="text" id="num" value="" />
</body>
<script type="text/javascript">
(function(){
var oNum = document.getElementById('num');
oNum.onkeydown = function(e){
var e = e||event;
if(e.keyCode == 8 ){
return true;
}else if(e.keyCode==37){
return true;
}else if(e.keyCode==39){
return true;
}else if(e.keyCode==46){
return true;
}else if(e.keyCode>=48&&e.keyCode<=57){
return true;
}else{
return false;
}
}
})()
</script>
</html>
转载请注明原文地址: https://www.6miu.com/read-85415.html
