日期:2014-05-16 浏览次数:20440 次
$('#month').blur(function() {
    var va = $("#month").attr("value");
    if (va != "" && !/^\d+(.\d{1,2})?$/.test(va)) {
        window.alert('月份输入错误!');
        $("#month").focus(function(){
            $("#month").val($("#month").val());
        });
        $("#month").focus();
        return false;
    }
});
<!DOCTYPE html>
<html>
<head>
    <meta charset=utf-8 />
    <meta name="author" content="http://weibo.com/zswang" />
    <title>Demo 示例控制输入光标位置</title>
    <style>
        
    </style>
</head>
<body>
    <input id="editor" type="text" value="1234" />
    <input id="left" type="button" value="left" >
    <input id="right" type="button" value="right" >
    <script>
void function(){
    function setSelection(editor, pos){
        if (editor.setSelectionRange){
            editor.focus();
            editor.setSelectionRange(pos, pos);
        } else if (editor.createTextRange){
            var textRange = editor.createTextRange();
            textRange.collapse(true);
            textRange.moveEnd("character", pos);
            textRange.moveStart("character", pos);
            textRange.select();
        }
    }
  
    var editor = document.getElementById('editor');
    document.getElementById('left').onclick = function(){
        setSelection(editor, 0);
    }
    document.getElementById('right').onclick = function(){
        setSelection(editor, editor.value.length);
    }
}();
    </script>
</body>
</html>