Validation de formulaire

Question

Je suis nouveau dans JavaScript.Je veux valider un formulaire avec cinq colonnes.

formdescription

Mon formulaire contient 5 champs d'entrée et une Buttom Soumettre

Je veux suivre la sortie

bouton de soumission 1.Initive désactivé.

2.Toutez les champs du bouton Entrée sera activé.

ou bien

1.Displayage d'une boîte d'alerte .. Tels que "tous les champs sont dignes d'entrer"

merci.

Answer 1

If it is SharePoint List form, you can simply make the fields as Required and SharePoint will handle it...

But if its some other form, which I think it is... you can use JavaScript like this:

<script type="text/javascript">
function onSubmitValidation() {
   if (TrimAll(document.getElementById("field1").value) == "") {
       alert('All fields are must be enter');
       return false;
   }
   if (TrimAll(document.getElementById("field2").value) == "") {
       alert('All fields are must be enter');
       return false;
   }
   // check for rest of the fields - field3, field4, field5

   return true;
}

function TrimAll(s) {
    var l = 0; var r = s.length - 1;
    while (l < s.length && s[l] == ' ')
    { l++; }
    while (r > l && s[r] == ' ')
    { r -= 1; }
    return s.substring(l, r + 1);
}
</script>

HTML can look like:

Fields <input type="text" id="field1" /><input type="text" id="field2" /><input type="text" id="field3" /><input type="text" id="field4" /><input type="text" id="field5" />

<asp:Button ID="btnSubmit" Text="Submit" OnClientClick="onSubmitValidation" OnClick="btnSubmit_Click" />

However if you want to utilize input fields in Server-Side code then replace <input with <asp:TextBox

Javascript change:
Replace document.getElementById("field1").value with document.getElementById("<%= field1.ClientID %>").value

HTML change:
Replace <input type="text" id="field1" /> with <asp:TextBox ID="field1" runat="server" />

Answer 2

function button_action(){
    if(!document.myform.field1.value)
    {
        alert("enter fields1");
        document.myform.field1.focus();
        return false;
    }
        if(!document.myform.field2.value)
    {
        alert("enter fields2");
        document.myform.field2.focus();
        return false;
    }
        if(!document.myform.field3.value)
    {
        alert("enter fields3");
        document.myform.field3.focus();
        return false;
    }
        if(!document.myform.field4.value)
    {
        alert("enter fields4");
        document.myform.field4.focus();
        return false;
    }
        if(!document.myform.field5.value)
    {
        alert("enter fields5");
        document.myform.field5.focus();
        return false;
    }


alert("congrats");
}

<form name="myform">

<input type="text" name="field1" size="10" />
<input type="text" name="field2" size="10" />
<input type="text" name="field3" size="10" />
<input type="text" name="field4" size="10" />
<input type="text" name="field5" size="10" />


<input type="button" value="submit" onclick="button_action()" />

</form>