javascript确认不会停止提交表单

问题描述：

i am trying to do a confirm function using javascript in php which it worked only in showing the buttons but whatever you press the form will submit heres the code and the function

<form action='Allocated.php' method='post'  >
    <input type='submit' name='disc' value='Discontue Asset'    formnovalidate='formnovalidate' onclick='myFunction()' />
    <input type='hidden' name='alloc' value='$AllocID' />
    </td>
</form>

and the function

function myFunction() {
    var r = confirm("Press a button!");
    if (r == true) {
        return true;
    } else {
        return false;
    }
}

any help would be appreciated THanks

我正在尝试使用php中的javascript执行确认功能，它只用于显示按钮但是无论你按什么表单将提交代码和函数 p>

 ＆lt; form action ='Allocated.php'method ='post'＆gt; 
＆lt; input type ='submit  'name ='disc'value ='Discontue Asset'formnovalidate ='formnovalidate'onclick ='myFunction（）'/＆gt; 
＆lt; input type ='hidden'name ='alloc'value ='$ AllocID'/＆gt  ; 
＆lt; / td＆gt; 
＆lt; / form＆gt; 
  code>  pre> 
 
 和函数 p> 
 
 
 函数myFunction  （）{
 var r = confirm（“按一个按钮！”）; 
 if（r == true）{
 return true; 
} else {
 return false; 
} 
} \  n  code>  pre> 
 
 任何帮助将不胜感激
THanks  p> 
  div>

答

Change onclick='myFunction()' to onsubmit='return myFunction()' so that the returned value from the function can be returned to the event.

答

use this:

function myFunction() {
    var r = confirm("Press a button!");
    if (r) {
        return true;
    } else {
        return false;
    }
}

or: for booleans you must use === instead of == :

function myFunction() {
    var r = confirm("Press a button!");
    if (r == true) {
        return true;
    } else {
        return false;
    }
}

function myFunction() {
    var r = confirm("Press a button!");
    if (r === 1) {
        return true;
    } else {
        return false;
    }
}

答

Put this function at attribute onsubmit (with return keyword, thx Scott) on form and change to button

<form action="Allocated.php" method="post" onsubmit="return myFunction()">
    <input type="hidden" name="alloc" value="$AllocID" />
    <button type="submit">Discontue Asset</button>
</form>

</div>

答

You can try code below, It's much simpler

Give an id to your form

<form action='Allocated.php' method='post' id="myform">
<input type='submit' name='disc' value='Discontue Asset'    formnovalidate='formnovalidate' onclick='myFunction()' />
<input type='hidden' name='alloc' value='$AllocID' />
</td>

Then write your javascript like this

function myFunction() {
var r = confirm("Press a button!");
if (r) {
    document.getElementById('myform').submit();
} else {
    return false;
}

}

javascript确认不会停止提交表单

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