我目前有两个下拉框，我想知道是否有人可以帮助我如何在用户按下按钮后将两个输出值连接成一个句子。
这是我目前正在使用的代码:
<!DOCTYPE html>
<html>
<body>
<form action="action_page.php">
<select id="selectcars" name="cars">
<option value="volvo" selected>Volvo</option>
<option value="saab">Saab</option>
<option value="fiat">Fiat</option>
<option value="audi">Audi</option>
</select>
</form>
<div class="text-for-car" id="volvo">Your text for "Volvo"</div>
<div class="text-for-car" id="saab">Your text for "Saab"</div>
<div class="text-for-car" id="fiat">Your text for "Fiat"</div>
<div class="text-for-car" id="audi">Your text for "Audi"</div>
<style>
.text-for-car {display: none;}
#volvo {display: block;}
</style>
<script>
document.getElementById("selectcars").addEventListener("change", function () {
var id = this.options[this.selectedIndex].value;
var texts = document.getElementsByClassName("text-for-car");
for (var i = 0; i < texts.length; i++) {
if (texts[i].id == id) texts[i].style.display = "block";
else texts[i].style.display = "none";
}
})
</script>
<form>
<select id="selectcars2" name="cars2">
<option value="volvo2" selected>Volvo</option>
<option value="saab2">Saab</option>
<option value="fiat2">Fiat</option>
<option value="audi2">Audi</option>
</select>
</form>
<div class="text-for-car2" id="volvo2">Your text for "Volvo"</div>
<div class="text-for-car2" id="saab2">Your text for "Saab"</div>
<div class="text-for-car2" id="fiat2">Your text for "Fiat"</div>
<div class="text-for-car2" id="audi2">Your text for "Audi"</div>
<style>
.text-for-car2 {display: none;}
#volvo2 {display: block;}
</style>
<script>
document.getElementById("selectcars2").addEventListener("change", function () {
var id2 = this.options[this.selectedIndex].value;
var texts2 = document.getElementsByClassName("text-for-car2");
for (var i = 0; i < texts2.length; i++) {
if (texts2[i].id == id2) texts2[i].style.display = "block";
else texts2[i].style.display = "none";
}
})
</script>
</body>
</html>有什么帮助吗？提前致谢!
最佳答案
您的演示有点长，我不想将所有内容分开，但我在那里制作了一个快速演示，应该可以帮助您解决问题。
http://codepen.io/paulcredmond/pen/JRxqPG
<label for="car">Car</label>
<select id="car">
<option value="Ford">Ford</option>
<option value="Fiat">Fiat</option>
<option value="Volvo">Volvo</option>
</select>
<label for="engine">Engine</label>
<select id="engine">
<option value="1.4 Petrol">1.4 Petrol</option>
<option value="1.6 Petrol">1.6 Petrol</option>
<option value="2.0 TDI">2.0 TDI</option>
</select>
<p>You have chosen a <span class="car">Ford </span> with a <span class="engine">1.4 Petrol</span> engine.</p>
$('#car').on('change', function() {
var s = $(this).val();
console.log(s);
$('p .car').text(s);
});
$('#engine').on('change', function() {
var s = $(this).val();
console.log(s);
$('p .engine').text(s);
});
关于html - 带按钮的多个下拉菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40220966/