Ultrabenosaurus/query_string_remove.js

## query_string_remove.js
function query_string_remove(find, val){
	// get query string, remove ? and split on &
	qryStr = window.location.search.replace("?", "");
	qryPrts = qryStr.split('&');
	// assume search will fail, for return value
	found = false;

	// relies on jQuery for simplicity of this function
	// use your own foreach function if you prefer
	jQuery.each(qryPrts, function(i, v) {
		// don't try to operate on empty array item
		if(v !== undefined){
			// split on = to make comparisons easier
			var tmpQry = v.split("=");
			// check if user wants to look for a specific value
			if(val === '' || val === null || typeof val === 'undefined'){
				// assuming, they don't care about value
				if(tmpQry[0] == find){
					// remove item if found
					qryPrts.splice(i, 1);
					// set return value to true
					found = true;
				}
			} else {
				// if they want to remove only on a specific value
				if(tmpQry[0] == find && tmpQry[1] == val) {
					// remove item if found
					qryPrts.splice(i, 1);
					// set return value to true
					found = true;
				}
			}
		}
	});
	// if item was removed, replace original query with joined array
	if(found){
		qryStr = qryPrts.join('&');
	}

	// return array of true/false, processed query and search parameters
	results = [found, ('?'+qryStr), find, val];
	return results;
}

## query_string_remove_test.html
<!DOCTYPE html>
<html>
<head>
	<meta charset='utf-8' />
	<title>JS Test</title>
	<script type='text/javascript' src='jquery.js'></script>
</head>
	<body>
		<ul>
			<li><a href="?foo=bar&cheese=tasty&test=success">add a querystring</a></li>
			<li><a href="javascript: change_url('test', 'failure');">remove test when it equals 'failure'</a></li>
			<li><a href="javascript: change_url('test', 'success');">remove test when it equals 'success'</a></li>
			<li><a href="javascript: change_url('foo');">remove foo regardless of value</a></li>
		</ul>
		<div id='results'></div>
		<script type='text/javascript'>
		function change_url(find, val){
			url = query_string_remove(find, val);
			if(url[0]){
				window.location.href = url[1];
			} else {
				if(url[3] === '' || url[3] === null || typeof url[3] === 'undefined'){
					text = url[2] + ' was not found.';
				} else {
					text = url[2] + '=' + url[3] + ' was not found.';
				}
				document.getElementById('results').innerText = text;
			}
		}

		function query_string_remove(find, val){
			qryStr = window.location.search.replace("?", "");
			qryPrts = qryStr.split('&');
			found = false;
			split = false;

			jQuery.each(qryPrts, function(i, v) {
				if(v !== undefined){
					var tmpQry = v.split("=");
					if(val === '' || val === null || typeof val === 'undefined'){
						if(tmpQry[0] == find){
							qryPrts.splice(i, 1);
							found = true;
						}
					} else {
						split = true;
						if(tmpQry[0] == find && tmpQry[1] == val) {
							qryPrts.splice(i, 1);
							found = true;
						}
					}
				}
			});
			if(found){
				qryStr = qryPrts.join('&');
			}
			results = [found, ('?'+qryStr), find, val];
			return results;
		}
		</script>
	</body>
</html>
	function query_string_remove(find, val){
	// get query string, remove ? and split on &
	qryStr = window.location.search.replace("?", "");
	qryPrts = qryStr.split('&');
	// assume search will fail, for return value
	found = false;

	// relies on jQuery for simplicity of this function
	// use your own foreach function if you prefer
	jQuery.each(qryPrts, function(i, v) {
	// don't try to operate on empty array item
	if(v !== undefined){
	// split on = to make comparisons easier
	var tmpQry = v.split("=");
	// check if user wants to look for a specific value
	if(val === '' \|\| val === null \|\| typeof val === 'undefined'){
	// assuming, they don't care about value
	if(tmpQry[0] == find){
	// remove item if found
	qryPrts.splice(i, 1);
	// set return value to true
	found = true;
	}
	} else {
	// if they want to remove only on a specific value
	if(tmpQry[0] == find && tmpQry[1] == val) {
	// remove item if found
	qryPrts.splice(i, 1);
	// set return value to true
	found = true;
	}
	}
	}
	});
	// if item was removed, replace original query with joined array
	if(found){
	qryStr = qryPrts.join('&');
	}

	// return array of true/false, processed query and search parameters
	results = [found, ('?'+qryStr), find, val];
	return results;
	}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset='utf-8' />
	<title>JS Test</title>
	<script type='text/javascript' src='jquery.js'></script>
	</head>
	<body>
	<ul>
	<li><a href="?foo=bar&cheese=tasty&test=success">add a querystring</a></li>
	<li><a href="javascript: change_url('test', 'failure');">remove test when it equals 'failure'</a></li>
	<li><a href="javascript: change_url('test', 'success');">remove test when it equals 'success'</a></li>
	<li><a href="javascript: change_url('foo');">remove foo regardless of value</a></li>
	</ul>
	<div id='results'></div>
	<script type='text/javascript'>
	function change_url(find, val){
	url = query_string_remove(find, val);
	if(url[0]){
	window.location.href = url[1];
	} else {
	if(url[3] === '' \|\| url[3] === null \|\| typeof url[3] === 'undefined'){
	text = url[2] + ' was not found.';
	} else {
	text = url[2] + '=' + url[3] + ' was not found.';
	}
	document.getElementById('results').innerText = text;
	}
	}

	function query_string_remove(find, val){
	qryStr = window.location.search.replace("?", "");
	qryPrts = qryStr.split('&');
	found = false;
	split = false;

	jQuery.each(qryPrts, function(i, v) {
	if(v !== undefined){
	var tmpQry = v.split("=");
	if(val === '' \|\| val === null \|\| typeof val === 'undefined'){
	if(tmpQry[0] == find){
	qryPrts.splice(i, 1);
	found = true;
	}
	} else {
	split = true;
	if(tmpQry[0] == find && tmpQry[1] == val) {
	qryPrts.splice(i, 1);
	found = true;
	}
	}
	}
	});
	if(found){
	qryStr = qryPrts.join('&');
	}
	results = [found, ('?'+qryStr), find, val];
	return results;
	}
	</script>
	</body>
	</html>