Javascript：单选按钮，并根据显示方式显示图像

Question

我目前正在根据从单选按钮选择的值来显示图像。 但是我目前遇到了使代码尽可能短而有效的问题。 我有几种类别可供选择，而我要解决此问题的方式将要求我编写多个check_value# 。 有没有办法结合这两个功能？ 因此，将来如果我有5或7个类别，我将不必为每个类别都有一个功能。 例

<script>
 function check_value(val) {     
    var el = document.getElementById("imgBox1");
    var img = imgs[val];
    if (val>0 && val<4) { //will trigger when [1,2,3]
        el.src = "images/bike" + val + ".jpg";
        el.style.display = "";
    }    
}

 function check_value1(val) {    
    var el = document.getElementById("imgBox2");
    var img = imgs[val];
    if (val>0 && val<4) { //will trigger when [1,2,3]
        el.src = "images/tire" + val + ".jpg";
        el.style.display = "";
    }    
}
</script>    

的HTML

<h2>Choose a bike</h2>
    <form name="builder">
        <input type="radio" name="field" value="1" onclick='check_value(0)'/> KAWASAKI KX 450F<br />
         <input type="radio" name="field" value="2" onclick='check_value(1)'/> 2010 Yamaha Road Star S<br />
         <input type="radio" name="field" value="3" onclick='check_value(2)'/> Aprilia RSV4<br />
    </form>

<img id="imgBox1" src="#" style="display:none"> 

<h2>Choose a tire</h2>  
    <form name="tire">
        <input type="radio" name="field" value="1" onclick='check_value1(0)'/> Michelin Pilot Road 3 Tires<br />
        <input type="radio" name="field" value="2" onclick='check_value1(1)'/> Dunlop Roadsmart Sport-Touring Tires<br />
         <input type="radio" name="field" value="3" onclick='check_value1(2)'/> Pirelli Scorpion Trail Tires<br />
    </form>

<img id="imgBox2" src="#" style="display:none"> 

Answer 1

这是使用自定义HTML属性和jQuery Javascript库为您准备的小提琴：

显然，您确实希望设置图像的来源，而不是在段落中显示url，但是我敢肯定，您会想到的。

// html
<input type="radio" name="tire" img-preview="tire-preview" img-loc="tire/1.jpg" /> First<br>
<input type="radio" name="tire" img-preview="tire-preview" img-loc="tire/2.jpg" /> Second<br>
<p id="tire-preview">
Load: -
</p>
<input type="radio" name="wheel" img-preview="wheel-preview" img-loc="wheel/1.jpg" /> Uno<br>
<input type="radio" name="wheel" img-preview="wheel-preview" img-loc="wheel/2.jpg" /> Dos<br>
<p id="wheel-preview">
Load: -
</p>​

// js
$("input[type=radio]").click(function(){

    var imageUri = "http://site.com/images/" + $(this).attr("img-loc");

    $("#" + $(this).attr("img-preview") ).text("Load: " + imageUri);

});​

Answer 2

试试这个，更新

将图像名称命名为bike＃.jpg，tire＃.jpg bike0.jpg，bike1.jpg，bike2.jpg ....

function check_value(val, id, type) {     
    var el = document.getElementById("imgBox" + id);
    if (val>0 && val<4) { //will trigger when [1,2,3]
       el.src = "images/"+ type + val + ".jpg";
       el.style.display = "";
  }    

}

<h2>Choose a bike</h2>
<form name="builder">
    <input type="radio" name="field" value="1" onclick='check_value(0, 1, "bike")'/> KAWASAKI KX 450F<br />
     <input type="radio" name="field" value="2" onclick='check_value(1, 1, "bike")'/> 2010 Yamaha Road Star S<br />
     <input type="radio" name="field" value="3" onclick='check_value(2, 1, "bike")'/> Aprilia RSV4<br />
</form>

<img id="imgBox1" src="#" style="display:none"> 

<h2>Choose a tire</h2>  
<form name="tire">
    <input type="radio" name="field" value="1" onclick='check_value(0, 2, "tire")'/> Michelin Pilot Road 3 Tires<br />
    <input type="radio" name="field" value="2" onclick='check_value(1, 2, "tire")'/> Dunlop Roadsmart Sport-Touring Tires<br />
    <input type="radio" name="field" value="3" onclick='check_value(2, 2, "tire")'/> Pirelli Scorpion Trail Tires<br />
</form>

<img id="imgBox2" src="#" style="display:none">

Answer 3

你可以用这个

<script>
function call(formNo,val)
  {if()//give your checkings here according to what you want
    {}
    alert(formNo+" "+val); //just for example what values you are getting
   }
</script>

<h2>Choose a bike</h2>
<form name="builder" id="1">
    <input type="radio" name="field" value="1" onclick='check_value(1,0)'/> KAWASAKI KX 450F<br />
     <input type="radio" name="field" value="2" onclick='check_value(1,1)'/> 2010 Yamaha Road Star S<br />
     <input type="radio" name="field" value="3" onclick='check_value(1,2)'/> Aprilia RSV4<br />
</form>
<img id="imgBox1" src="#" style="display:none"> 
<h2>Choose a tire</h2>  
<form name="tire" id="2">
    <input type="radio" name="field" value="1" onclick='check_value1(2,0)'/> Michelin Pilot Road 3 Tires<br />
    <input type="radio" name="field" value="2" onclick='check_value1(2,1)'/> Dunlop Roadsmart Sport-Touring Tires<br />
     <input type="radio" name="field" value="3" onclick='check_value1(2,2)'/> Pirelli Scorpion Trail Tires<br />
</form>
<img id="imgBox2" src="#" style="display:none">