Enable button only if all fields are filled out?_问答_开发者

Enable button only if all fields are filled out?

开发者 https://www.devze.com 2023-02-28 08:45 出处：网络

I have a form that I want to only let the button be active if the user has filled out all the info. I am new to javascript and would like a little help. Thanks!

Here's my script:

<script type="text/javascript">
function enableDisableSend(oFld){
name = oFld.form.summary.value;
question = oFld.form.question.value;

if (question == '' OR name == '') {
oFld.form.write.disabled = TRUE;
document.getElementById("write").className = 'comment_popup_button_disabled';
} else {
   oFld.form.write.disabled = FALSE;
   document.getElementById("write").className = 'comment_popup_button_active';
}
}
</script>

<body onload="enableDisableSend(document.login.comments)">


<form name="login" method="post" id="login">
    <input type='text' 
            name='summary' 
            id='summary' 
   开发者_运维技巧         onFocus="clearText(this)" 
            onBlur="clearText(this)" 
            class="support_popup_form" 
            value="" onkeyup="enableDisableSend(this)" 
            onblur="enableDisableSend(this)" 
            onpaste="setTimeout('enableDisableSend(document.'+this.form.name+'.'+this.name+')', 10)" 
    />
    <textarea name="question" 
              id='question' 
              rows="10" 
              class="support_popup_form" 
              onFocus="clearText(this)" 
              onBlur="clearText(this)" 
              style="min-height: 164px; max-height: 164px;" 
              onkeyup="enableDisableSend(this)" 
              onblur="enableDisableSend(this)" 
              onpaste="setTimeout('enableDisableSend(document.'+this.form.name+'.'+this.name+')', 10)" 
              maxlength="120">
    </textarea>
    <input type='submit' 
           value='Ask Question' 
           class="comment_popup_button_disabled" 
           id="write" 
           name="write"/></div>
</form>

However, nothing happens when you change the field. Can you please help me modify my code to make it work or guide me in the right direction?

Thanks

Coulton

the syntax for an OR condition is ||