js 方法

<script type="text/javascript">
function upperCase(x)
{
    var y=document.getElementById(x).value;
    document.getElementById(x).value=y.toUpperCase();
}

function myFocus(x)
{
    var inputLen=document.getElementById(x).value.length;
    var maxLen=document.getElementById(x).maxLength;
    if(maxLen==inputLen)
    {
        document.getElementById('text2').focus();
    }
}

function down(x)
{
    var inputLen=document.getElementById(x).value.length;
    var maxLen=document.getElementById(x).maxLength;
    alert(inputLen);
}

function up(x)
{
    var inputLen=document.getElementById(x).value.length;
    var maxLen=document.getElementById(x).maxLength;
    alert(inputLen);
}
</script>