字符串截取数字和点击radio显示不同内容

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>test</title>
<script type="text/javascript">
function payTypeClick(){
    var gameMoneyActStr = document.getElementById("gameMoneyAct").innerHTML;
    var dummycurStr= gameMoneyActStr.replace(/^[^\d]*(\d+)[^\d]*$/, "$1");          //字符串中截取数字
    if(document.getElementById("payTypeGame").checked){
            document.getElementById('gameMoneyAct').innerHTML=dummycurStr+"万点游戏币";
        }
        else{
            document.getElementById('gameMoneyAct').innerHTML=dummycurStr+"个金币";
        }
}
</script>
</head>
<body>

<table id="rl">
<tr>
<td><label>全游戏币充值</label>
<input id="payTypeGame" class="radioItem" checked="checked" name="rl$tt" type="radio" value="1"  onClick="payTypeClick();"/>
<label>全金币充值</label>
<input id="payTypeGold" class="radioItem" name="rl$tt" type="radio" value="2"  onClick="payTypeClick();"/></td>
</tr>
</table>
<div id="gameMoneyAct">40万点游戏币</div>
</body>
</html>

字符串截取数字和点击radio显示不同内容

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