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this is My Last Problem

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24-Nov-09 00:18
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jasvir275500 jasvir275500's avatar Rank: none
No stars yet
Posts: 1
From: India
Pls kindly Read the Following ASP/VBscript Code:
<Script Language="VBScript">
<%
if pn = "" then
%>
msgbox "Enter Vehicle Name First"
history.back
<% end if %>
</script>
Sir the Problem is that if user does't enter the name in to the fields then this code is showing a msgbox "Enter Vehicle name first" but other field information information is inserted into the backend.
while it shouldn't.
Pls kindly reply sooooon
My email. jasvir275500@yahoo.com
24-Nov-09 21:03
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cat cat's avatar Rank: gold
Gold
Posts: 454
From: Australia
Hi there,

It's not completely clear from your post, but I think you are using this VBScript client side on the browser?

VBScript client side only works on IE. For better compatibility, you should use Javascript for form validation:
http://www.elated.com/articles/form-validation-with-javascript/

The other problem is that you should be preventing the form submit if the validation fails, which history.back will never do. Typically you'd do this with some code like this in the HTML form declaration



<form onsubmit="return validate(this)">



and then you get the validate() javascript function to return false if not valid, or true if everything's ok. Something like this:



function validate(f)
{
  if (f.pn.value == "")
  {
    alert("Enter Vehicle Name";
    return false;
  }
  return true;
}



Cat

[Edited by cat on 25-Nov-09 16:43]

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