How to get Form Element Value using JavaScript

Question

I am trying to find value of the input element in a popup window which is being opened from a parent page.

My code is below. I am getting not able to get pc value from input.

<html>
<head>
<? 
$pid=$_GET['pid'];
$cart_url = '../cart.php?action=add&p='.$pid;
echo $cart_url;
?>  
</head>

<body>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function sendValue(val){
window.opener.document.getElementById('details_<?=$pid?>').value = val;
window.opener.location.href='<?php echo $cart_url; ?>&pc='.concat(val);
window.close();
window.location.reload();
}
</script>
<form name="selectform">
<label>Enter Price:</label>
<input id="1" name="details_<?=$pid?>" type="text"></input>
<input   type="Submit"  onsubmit="sendValue(this.value)"></input>
</form> 
</body>
</html>

Answer 1

Code:

<input id="1" name="details_<?=$pid?>" type="text"></input>
<input   type="Submit"  onsubmit="sendValue(this.value)"></input>

Change to:

  <input id="details" type="text">
  <input type="button" value='Send...' onclick="sendValue(document.getElementById('details').value)">

Answer 2

Just make your input box id from

<input id="1" name="details_<?=$pid?>" type="text"></input>

to

<input id="details_<?=$pid?>" name="details_<?=$pid?>" type="text"></input>

It should work

Answer 3

如果使用的是getElementById ，则必须使用pass来尝试获取其值的元素的id（在本例中为1）。

How to get Form Element Value using JavaScript

Question

3 answers

solution1
1 ACCPTED 2013-05-20 02:07:43

solution2
0 2013-05-20 01:53:32

solution3
0 2013-05-20 02:54:31

How to get Form Element Value using JavaScript

Question

3 answers

solution1 1 ACCPTED 2013-05-20 02:07:43

solution2 0 2013-05-20 01:53:32

solution3 0 2013-05-20 02:54:31

solution1
1 ACCPTED 2013-05-20 02:07:43

solution2
0 2013-05-20 01:53:32

solution3
0 2013-05-20 02:54:31