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Javascript form processing

Posted on 2008-10-22
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Last Modified: 2012-06-27
When I submit a form using the get method and it takes to the next html page. how do I access values from the previous page ?


Here's my form from the first page:

<form action="searchResults.html" method="get">
Search for the database:
<input type="text" name="query" />
<input type="submit" alue="Go" />
</form>

On the second page, the URL looks kind of like this if I entered 'xyz' into the input box:
file:///E:/Project/searchResults.html?...

How do I access whatever the user entered in the input box?
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Question by:kgpretty
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6 Comments
 
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Expert Comment

by:MatthiasVance
Comment Utility
Here's some example code I found on the web:
http://www.idealog.us/2006/06/javascript_to_p.html

Kind regards,

Matthias Vance
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LVL 82

Accepted Solution

by:
hielo earned 50 total points
Comment Utility
in searchResults.html use:

<script>
function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}
var q = gup("query");
alert( q );
</script>

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Author Closing Comment

by:kgpretty
Comment Utility
Great answer! Works like a charm. Thankyou
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Author Comment

by:kgpretty
Comment Utility
Oops.. I think I accepted to early. What if the query submitted through the form had spaces in? That would mean the text comes up on my searchResults page with '+' where the spaces were. How do I remove the '+'?
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LVL 82

Expert Comment

by:hielo
Comment Utility
var q = gup("query").replace(/[+]/g,' ');
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LVL 82

Expert Comment

by:hielo
Comment Utility
An alternative to the replace() I posted earlier would be to change:
return results[1];


to:
return decodeURIComponent(results[1]);
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