如何将 JS 变量传递到“value=”变量中INPUT 语句的参数

发布于 2024-10-09 19:49:28 字数 594 浏览 2 评论 0原文

下面的示例应该将 JS 中的值显示为 INPUT 语句中的值，但没有。

<html>
<body>

<script type="text/javascript">
var qty = 1;
if (qty<3)
{
var shipping=1.92;
var shp_method="USPS First Class Package";
}
else if (qty>=3 && qty<14)
{
var shipping=4.85;
var shp_method="USPS Small Flat Rate Package";
}
else
{
var shipping=10.82;
var shp_method="USPS Medium Flat Rate Package";
}
</script>
<input type="text" name="shp_method" value="<?=shp_method;?>" TEXT STYLE="text-align:center" readonly="readonly" size="30">
</body>
</html>

原文

The example below should display the value from the JS as the value in the INPUT statement but does not.

<html>
<body>

<script type="text/javascript">
var qty = 1;
if (qty<3)
{
var shipping=1.92;
var shp_method="USPS First Class Package";
}
else if (qty>=3 && qty<14)
{
var shipping=4.85;
var shp_method="USPS Small Flat Rate Package";
}
else
{
var shipping=10.82;
var shp_method="USPS Medium Flat Rate Package";
}
</script>
<input type="text" name="shp_method" value="<?=shp_method;?>" TEXT STYLE="text-align:center" readonly="readonly" size="30">
</body>
</html>

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归属感 2024-10-16 19:49:28

您正在使用的语法：

value="<?=shp_method;?>"

仅对 PHP 有效。

如果你想使用 javascript，你可以这样做：

document.getElementById('#textbodID').value = shp_method;

你的代码应该是这样的：

<script type="text/javascript">
window.onload = function(){
    var qty = 1;
    if (qty<3)
    {
    var shipping=1.92;
    var shp_method="USPS First Class Package";
    }
    else if (qty>=3 && qty<14)
    {
    var shipping=4.85;
    var shp_method="USPS Small Flat Rate Package";
    }
    else
    {
    var shipping=10.82;
    var shp_method="USPS Medium Flat Rate Package";
    }

        document.getElementById('#textbodID').value = shp_method;
};
</script>

其中 textbodID 被假定为你的输入字段的 id ，它可以像这样分配：

<input id="textbodID" />

The syntax you are using:

value="<?=shp_method;?>"

is valid only for PHP.

If you want to do with javascript, you can do something like this:

document.getElementById('#textbodID').value = shp_method;

Your code should be like this:

<script type="text/javascript">
window.onload = function(){
    var qty = 1;
    if (qty<3)
    {
    var shipping=1.92;
    var shp_method="USPS First Class Package";
    }
    else if (qty>=3 && qty<14)
    {
    var shipping=4.85;
    var shp_method="USPS Small Flat Rate Package";
    }
    else
    {
    var shipping=10.82;
    var shp_method="USPS Medium Flat Rate Package";
    }

        document.getElementById('#textbodID').value = shp_method;
};
</script>

Where textbodID is assumed to be the id of your input field which can be assigned like this:

<input id="textbodID" />

回复收藏 0 原文

爱情眠于流年 2024-10-16 19:49:28

尝试这样：

<input type="text" name="ye" id="yea"> //input box 

        <script type="text/javascript">
        var mytime=new Date();
        document.getElementById("yea").value=(mytime.getFullYear());
</script>
<input type="submit" value="Submit" name="submit">// use submit button to get input value

然后在同一个jsp页面中使用scriplet标签：

像这样：

<%  String y=request.getParameter("submit"); 
   if(y.equals("Submit"))
   {
    String s=request.getParameter("ye");
    System.out.println(s);
   }
%>

单击提交后，您可以在控制台中看到javascript值。
然后将此字符串值保存在数据库中
然后你就可以在任何地方访问这个字符串了。
请不要复制并粘贴此示例。只是尝试在您的页面中写入以避免错误。

try like this:

<input type="text" name="ye" id="yea"> //input box 

        <script type="text/javascript">
        var mytime=new Date();
        document.getElementById("yea").value=(mytime.getFullYear());
</script>
<input type="submit" value="Submit" name="submit">// use submit button to get input value

then use scriplet tag in same jsp page:

like this:

<%  String y=request.getParameter("submit"); 
   if(y.equals("Submit"))
   {
    String s=request.getParameter("ye");
    System.out.println(s);
   }
%>

after click submit you can see javascript value in your console.
then save this string value in your database
and then u can access this String everywhere.
please don't copy and paste this example. just try to write in your page to avoid errors.

回复收藏 0 原文

垂暮老矣 2024-10-16 19:49:28

首先向输入添加一个 id 属性。
这将在页面加载后自动设置该值：

window.onload = function (){
var qty = 1;
if (qty<3)
{
var shipping=1.92;
var shp_method="USPS First Class Package";
}
else if (qty>=3 && qty<14)
{
var shipping=4.85;
var shp_method="USPS Small Flat Rate Package";
}
else
{
var shipping=10.82;
var shp_method="USPS Medium Flat Rate Package";
}
document.getElementById('inputId').value = shp_method;
}

First of all add an id attribute to the input.
this will automatically set the value as soon as the page loads:

window.onload = function (){
var qty = 1;
if (qty<3)
{
var shipping=1.92;
var shp_method="USPS First Class Package";
}
else if (qty>=3 && qty<14)
{
var shipping=4.85;
var shp_method="USPS Small Flat Rate Package";
}
else
{
var shipping=10.82;
var shp_method="USPS Medium Flat Rate Package";
}
document.getElementById('inputId').value = shp_method;
}

回复收藏 0 原文

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