摘要：<select name="test"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option></select>val : $("select[name='test']&quo 阅读全文

摘要：var test = "ABCDEFG : 55" ;var result = $.trim(test.split(" : ")[0].toString()) ; 阅读全文

摘要：是否数字：if (isNaN($(this).val())) { alert(it is not a number) ;}是否是正整数：var value = parseInt($(this).val())if (value < 0 || value != $(this).val()){ alert("it is not Signed Integer") ;} 阅读全文