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Question

How to pass the end of the URL to a Value="" in a form

Answer 1

A:

You can use the Javascript function described here to parse a value from the URL:

function getParameterValue(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];
}

You'd include that function in your script, then you can use an onload Javascript call to set the value as follows:

document.getElementById("search_text").value = getParameterValue("search_text");

For kicks, here's a full HTML page that sets the search_text parameter to a text field value:

<html>
<head>
<script>
    function getParameterValue(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];
    }

    function setSearchText() {
        document.getElementById("search_text").value = getParameterValue("search_text");
    }
</script>
</head>
<body onload="setSearchText();">
    <input type="text" name="t1" id="search_text" size=100 value="" />
</body>
</html>

Kaleb Brasee 2010-01-09 06:38:49

Answer 2

A:

Thank you Kaleb, the script you posted works, one problem remains,

the text passed into the box is "War%20and%20Peace" Instead of "War and Peace"

how can I eliminate those %20?

Thanks!

Galton 2010-01-10 16:15:55

Answer 3

A:

I solved the problem of the %20 by modifying the above script only 1 line - My thanks to Kaleb and all the others that I used portion of their codes to get the job done.

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

function setSearchText() {
        document.getElementById("search_text").value = getParameterValue("search_text");
}

var results = regex.exec( unescape(window.location.href) ); by changing this line with the word "unescape" now the text passes into the search box without the %20.

Galton 2010-01-12 15:36:16

If you appreciate it so much, why don't you 'accept' his answer so that a) he'll get the credit and b) everyone sees that this question has been answered.

mkoistinen 2010-09-09 22:36:43

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How to pass the end of the URL to a Value="" in a form

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