值 Javascript 输入
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Value Javascript Input
提问by Sebastian
how can i transfer the Value from Input 1 in 2 and add some letters?
如何将输入 1 中的值转移到 2 中并添加一些字母？
<script type="text/javascript">
function doit(){
document.getElementById('input2').value=document.getElementById('input1').value;
}
</script>
Input1: 2342
输入 1：2342
Input2: pcid2342d
输入 2：pcid2342d
Can some one help me?
有人能帮我吗？
回答by greg0ire
Just use the + operator to add a string before and after the input value.
只需使用 + 运算符在输入值前后添加一个字符串。
<script type="text/javascript">
function doit(){
document.getElementById('input2').value="pcid" + document.getElementById('input1').value + "d";
}
</script>
回答by Sebastian
String concatenation:
字符串连接：
document.getElementById('input2').value = "stuff" + document.getElementById('input1').value + "other stuff";
When dealing with numbers you could start by concatenating with empty string to avoid adding numbers together instead of concatenating to strings (because of operator evaluation order):
在处理数字时，您可以先连接空字符串以避免将数字相加而不是连接到字符串（因为运算符评估顺序）：
document.getElementById('input2').value = "" + 1234 + 567 + document.getElementById('input1').value + 89;
回答by Kira
Why don't you try something in jQuery?
你为什么不在 jQuery 中尝试一些东西？
$("#Anything").click(function() {
$("#Field1").val($("#Field2").val());
});
The "click" is just a assumption =)
“点击”只是一个假设 =)
回答by Matthew Abbott
Well you seem to have done the work already, all you need is something to click on to execute it:
好吧，您似乎已经完成了这项工作，您只需要单击即可执行它：
<button onclick="doit()">click me</button>
