where does the & go LOL

ok this is the javascript

<script type="text/javascript">

	var options = {
		script:"test.php?json=true&limit=6&one="+document.getElementById('oneone').value,
		//script:"test.php?json=true&limit=6&",
		varname:"input", 
		json:true,
		shownoresults:false,
		maxresults:6,
		callback: function (obj) { document.getElementById('testid').value = obj.id; },
		
	};
	var as_json = new bsn.AutoSuggest('testinput', options);

</script>

Code (markup):

ok now no with this code not commented out i get

script:"test.php?json=true&limit=6&one="+document.getElementById('oneone').value,

Code (markup):

i get the value of oneone in firebug test.php?json=true&limit=6&one=s_city

when i comment that out and put in

script:"test.php?json=true&limit=6&",

Code (markup):

i get test.php?json=true&limit=6& varname=input

what i am asking is i know (well i think)i need a & in the first little section of code so i keeps adding the var name to the url .

please help thanks