JavaScript - 从脚本中将值写入html表单 [英] JavaScript - writing value into html form from script

问题描述

我想知道如何使用html将值输入到表单中。
因此，当用户访问该网站时，文本框中已经有数字，他们使用这些数字进行游戏和添加游戏。
这是我到目前为止：

I was wondering how I could input a value into a form with html. So right when the user goes to the site there's numbers in the text boxes already and they use those numbers to play and "addition game". This is what I have so far:

     <script type="text/javascript">

    function addSubmit() {
//trying to have num1 and num2 write into the html form
    var num1= Math.floor(89+Math.random()*11);
    var num2 = Math.floor(89+Math.random()*11);
    /*num1 = value1
    num2 = value2*/
    document.getElementById("value1").value = num1;
    document.getElementById("value2").value = num2;

    var guess = document.getElementById("submit").value;
    var answer = num1 + num2;
    //have to write this to main window
    if (guess == answer)
    document.writeln("Congratulations you answered correctly! The answer to: "+num1+"+"+num2+"= "+answer);
    else
    document.writeln("Nice try, but the correct answer to: "+num1+"+"+num2+"= "+answer);
    }

    function addGiveUp() {
    var num1 = Math.floor(89+Math.random()*11)
    var num2 = Math.floor(89+Math.random()*11)
    document.addition.value1.value=num1;
    document.addition.value2.value=num2;
    var guess = document.getElementById("submit").value;
    var answer = (document.getElementById("value1").value) + (document.getElementById("value2").value);
    document.writeln("Never give up! The answer to: "+num1+"+"+num2+"= "+answer);
    }
    </script>
    <form name="addition" action="" method="get">
    <table border="1">
             <tr>
         <td>Value 1:</td> <td><input type="text" name="value1" id="value1"/></td>
                 </tr>
             <tr>
         <td>Value 2:</td> <td><input type="text" name="value2" id="value2"/></td>
                 </tr>
             <tr>
         <td>Answer:</td> <td><input type="text" id="answer" /></td>
                 </tr>
             <tr><td><input type="button" value="Submit" onClick="addSubmit()" id="submit" /></td><td><input type="button" value="Give Up" onClick="addGiveUp()" /></td></tr>
             </table>
    </form>

感谢您的帮助！谢谢！

推荐答案

好的，您可以在创建表单后放入这个脚本：

well you can put this script after the form is created:

<form name="addition" action="" method="get">
            <table border="1">
                     <tr>
                 <td>Value 1:</td> <td><input type="text" name="value1" id="value1"/></td>
                         </tr>
                     <tr>
                 <td>Value 2:</td> <td><input type="text" name="value2" id="value2"/></td>
                         </tr>
                     <tr>
                 <td>Answer:</td> <td><input type="text" id="answer" /></td>
                         </tr>
                     <tr><td><input type="button" value="Submit" onClick="addSubmit()" id="submit" /></td><td><input type="button" value="Give Up" onClick="addGiveUp()" /></td></tr>
                     </table>
</form>

<!-- This is the script-->
 <script type="text/javascript">
      document.getElementById("value1").value = Math.floor(89+Math.random()*11);
      document.getElementById("value2").value = Math.floor(89+Math.random()*11);​
  </script>

这会为您生成随机数并将它们放在
格式中。代码： http://jsfiddle.net/wVAFt/

That would generate random numbers for you and put them in the form See here for the code: http://jsfiddle.net/wVAFt/

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