printing a value in a hidden form field?

Discussion in 'JavaScript' started by mokimofiki, Jan 22, 2011.

0
  1. #1
    This is the line within the html that I need to have a javascript variable added to:
    <input type='hidden' name='multi' id='multi' value='179,1;197,1;430,1;316,1'>
    Code (markup):
    Currently this is what I have which I know is wrong:
    <input type='hidden' name='multi' id='multi' value='<script type=Javascript>document.write(s1);</script>,1;179,1;197,1;430,1;316,1'>
    Code (markup):
    s1 is defined earlier on the page with a 3 digit number that needs to be passed with the others in the hidden field ... without the <script type=Javascript>document.write(s1);</script> everything processes fine any thoughts?
     
    mokimofiki, Jan 22, 2011 IP
  2. Cash Nebula

    Cash Nebula Peon

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    #2
    Try this out:

    form.html
    
<html>
<head>
<script type="text/javascript">
	var s1 = '123';
	function changeValue() {
		var s2 = document.getElementById('multi').getAttribute('value');
		s2 = s1 + ',1;' + s2;
		document.getElementById('multi').setAttribute('value',s2);
	}
</script>
</head>
<body>
<form method='GET' onsubmit='changeValue();' action='result.html' >
<input type='hidden' name='multi' id='multi' value='179,1;197,1;430,1;316,1' />
<input type='submit' value='submit' />
</form>
</body>
</html>
    Code (markup):
    result.html
    
<html>
<head>
<script type="text/javascript">
	var s = location.search;
	var i = s.indexOf('multi=');
	s = s.slice(i+6, s.length);
	i = s.indexOf('&');
	s = s.slice(0, i);
	document.write(unescape(s));
</script>
</head>
<body>
</body>
</html>
    Code (markup):
    Hope that works :)
     
    Cash Nebula, Jan 22, 2011 IP