如題，該怎么寫呢，謝謝
4 回答
慕俠2389804
TA貢獻1719條經驗 獲得超6個贊
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<input type="text" oninput="aaa(this)"/>
<script>
function aaa(obj){
var num = obj.value;
var re=/^(\-?)\d*$/;
if(!re.test(num)){
isNaN(parseInt(num))?obj.value='':obj.value=parseInt(num);
}
if(parseInt(obj.value)>90){
obj.value=parseInt(90);
};
if(parseInt(obj.value)<-90){
obj.value=-parseInt(90);
}
}
</script>
</body>
</html>
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