如何使用var javascript onchange
甚至更新輸入值type="text"
?如何用var javascript onchange甚至更新input type =「text」值?
首先,填寫10000.225
到輸入type="text"
,然後它會警告10,000.23
(我的功能自動ReplaceNumberWithCommas
和roundFloat
)
這是我的問題,
我想更新輸入type="text"
與var zzz
(替換舊值EG: replace 10000.225 with 10,000.23
),我該怎麼做?
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.js"></script>
<script type="text/javascript">
function SetCard() {
var number_var = document.getElementById("number").value;
function ReplaceNumberWithCommas(yourNumber) {
//Seperates the components of the number
var components = yourNumber.toString().split(".");
//Comma-fies the first part
components [0] = components [0].replace(/\B(?=(\d{3})+(?!\d))/g, ",");
//Combines the two sections
return components.join(".");
}
function roundFloat(num,dec){
var d = 1;
for (var i=0; i<dec; i++){
d += "0";
}
return Math.round(num * d)/d;
}
var xxx = number_var;
var yyy = Math.round(xxx * 100)/100;
var zzz = (ReplaceNumberWithCommas(yyy));
alert(zzz);
}
</script>
<input type="text" id="number" onchange="SetCard()">
document.g etElementById(「number」)。value = zzz; – Cattla 2014-12-04 03:36:59