JavaScript自定义函数实现字符串转小写和转大写

2017-01-29 21:09:03 访问(1925) 赞(0) 踩(0)


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <style type="text/css">
        .btn
        {
            cursor: pointer;
            height: 25px;
            width: 80px;
            line-height: 23px;
            margin: 0px 4px;
            padding: 0 8px; *padding:02px;text-align:center;display:inline;border-radius:2px;font-size:12px;
        }</style>
</head>
<body>
    <h1>
        JavaScript自定义函数实现字符串转小写和转大写</h1>
    输入：<br />
    <textarea name="txt_Input" rows="2" cols="20" id="txt_Input" style="height: 100px;
        width: 99%;">www.slowx.net</textarea>
    <br />
    <br />
    <input type="button" id="btn_OK" class="btn" value="转小写" onclick="OkClick(true)" />
    <input type="button" id="btn_Up" class="btn" value="转大写" onclick="OkClick(false)" />
    <br />
    <br />
    输出：<br />
    <textarea name="txt_Output" rows="2" cols="20" id="txt_Output" style="height: 100px;
        width: 99%;"></textarea>
</body>
</html>

<script language="javascript" type="text/javascript">
    function StrGetLowerCase(str) {
        // 转小写 //
        if (str == null)
            return true;

        return str.toLowerCase();
    }
    function StrGetUpperCase(str) {
        // 转大写 //
        if (str == null)
            return true;

        return str.toUpperCase();
    }

    function OkClick(isToLower) {
        var inputCtrl = document.getElementById("txt_Input");
        var outputCtrl = document.getElementById("txt_Output");

        var theValue = inputCtrl.value;

        if (isToLower)
            theValue = StrGetLowerCase(theValue);
        else
            theValue = StrGetUpperCase(theValue);

        outputCtrl.value = theValue;
    }
 

</script>