<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input type="text" name="je" onblur="clearNoNum(this)"/>元
<script type="text/javascript">
function clearNoNum(obj) {
obj.value = https://www.cnblogs.com/zmdComeOn/p/obj.value.replace(/[^/d.]/g,""); //清除“數字”和“.”以外的字符
obj.value = https://www.cnblogs.com/zmdComeOn/p/obj.value.replace(/.{2,}/g,"."); //只保留第一個. 清除多余的
obj.value = https://www.cnblogs.com/zmdComeOn/p/obj.value.replace(".", "$#$").replace(/\./g, "").replace("$#$", ".");
obj.value = https://www.cnblogs.com/zmdComeOn/p/obj.value.replace(/^(/-)*(/d+)/.(/d/d).*$/,'$1$2.$3');//只能輸入兩個小數
if (obj.value.indexOf(".") < 0 && obj.value != "") {//以上已經過濾，此處控制的是如果沒有小數點，首位不能為類似于 01、02的金額
obj.value = https://www.cnblogs.com/zmdComeOn/p/parseFloat(obj.value);
}
if (!obj.value || obj.value =='0' || obj.value =https://www.cnblogs.com/zmdComeOn/p/='0.0' || obj.value =https://www.cnblogs.com/zmdComeOn/p/='0.00') {
alert('退款金額不能為空');
return;
}
// 正常得話繼續調后端介面
}
</script>
</body>
</html>
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/169017.html
標籤：JavaScript
上一篇：一起學Vue之入門篇
下一篇：ES6 Map 原理