几天前，我开始在XHTML Strict 1.0中编写转换器。虽然我正在制作下拉菜单，但我意识到选择之间存在随机空格。有什么方法可以解决它吗？这是我相当简单而又长的代码:(注意：它正在进行中，所以请忽略所有随机下拉选项：D。我也使用谷歌chorme。最后，如果你没关系只能用javascript修复它。）
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="EN" dit="ltr" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xml; charset=utf-8" />
<title>UKConverter</title>
<script type = "text/javascript">
</script>
</head>
<body>
<h1>Converter!</h1>
<form action = "">
<p>
<label>UK or US units?<label>
<select id = "country">
<option value = "UK">UK</option>
<option value = "US">US</option>
</select>
</p>
<p>
<label>Which type of category?</label>
<select id = "catergory">
<option value = "temperature">Temperature</option>
<option value = "volume">Volume</option>
<option value = "distance">Distance</option>
<option value = "weight">Weight</option>
<option value = "area">Area</option>
<option value = "speed">Speed</option>
<option value = "dataByte">Data byte</option>
<option value = "time">Time</option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "temperature">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "volumeUK">
<option value = "cubicMeter">Cubic meter</option>
<option value = "cubicDecimeter">Cubic decimeter</option>
<option value = "cubicCentimeter">Cubic centimeter</option>
<option value = "liter">Liter</option>
<option value = "deciliter">Deciliter</option>
<option value = "centiliter">Centiliter<option>
<option value = "milliliter">Milliliter</option>
<option value = "cubicInch">Cubic inch</option>
<option value = "cubicFoot">Cubic foot</option>
<option value = "cubicYard">Cubic yard</option>
<option value = "gallon">Gallon</option>
<option value = "oilBarrel">Oil barrel<option>
<option value = "pint">Pint<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "volumeUS">
<option value = "cubicMeter">Cubic meter</option>
<option value = "cubicDecimeter">Cubic decimeter</option>
<option value = "cubicCentimeter">Cubic centimeter</option>
<option value = "liter">Liter</option>
<option value = "deciliter">Deciliter</option>
<option value = "centiliter">Centiliter<option>
<option value = "milliliter">Milliliter</option>
<option value = "cubicInch">Cubic inch</option>
<option value = "cubicFoot">Cubic foot</option>
<option value = "cubicYard">Cubic yard</option>
<option value = "gallon">Gallon</option>
<option value = "oilBarrel">Oil barrel<option>
<option value = "fluidPint">Fluid pint<option>
<option value = "dryPint">Dry pint<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "distance">
<option value = "kilometer">Kilometer</option>
<option value = "meter">Meter</option>
<option value = "decimeter">Decimeter</option>
<option value = "centimeter">Centimeter</option>
<option value = "millimeter">Millimeter</option>
<option value = "mile">Mile<option>
<option value = "inch">Inch</option>
<option value = "foot">Foot</option>
<option value = "yard">Yard</option>
<option value = "nauticalMile">Nautical mile<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "weight">
<option value = "tonne">Tonne</option>
<option value = "kilogram">Kilogram</option>
<option value = "hectogram">Hectogram</option>
<option value = "gram">Gram</option>
<option value = "decigram">Decigram</option>
<option value = "centigram">Centigram<option>
<option value = "milligram">Milligram</option>
<option value = "microgram">Microgram</option>
<option value = "carat">Carat</option>
<option value = "grain">Grain</option>
<option value = "ounce">Ounce</option>
<option value = "pound">Pound<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert to?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert to?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert to?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert to?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert to?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert from?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
<p>
<label>What type of unit would you like to convert to?<label>
<select id = "typeOfUnit">
<option value = "celsius">Celsius</option>
<option value = "fahrenheit">Fahrenheit</option>
<option value = "kelvin">Kelvin</option>
<option value = "reaumur">Reaumur</option>
<option value = "newton">Newton</option>
<option value = "rankine">Rankine<option>
</select>
</p>
</form>
</body>
</html>
答案 0 :(得分：1)
您的HTML似乎格式不正确。块元素<option>缺少结束标记。
在大多数情况下，我看到下拉列表中的空白项目是因为开头</option>缺少结束<option>。
有几种验证工具可以确定良好的形成。或者您可以使用具有语法突出显示功能的IDE。