function searchUsers()
{
	var loading = $('loading');
	loading.style.display = 'block';
	var keyword = document.getElementById('keyword').value;
	var bywhat1 = document.getElementById('bywhat1');
	var bywhat2 = document.getElementById('bywhat2');
	var bywhat3 = document.getElementById('bywhat3');
	if (bywhat1.checked) {
	var bywhat = 'name';	
	}
	else if (bywhat2.checked){
	var bywhat = 'location';	
	}
	else {
	var bywhat = 'keyword';	
	}
	var url = 'ajax/searchUsers.php';
	var pars = '?keyword=' + encodeURIComponent(keyword) + '&bywhat=' + encodeURIComponent(bywhat);
	
	var myAjax = new Ajax.Request(
		url, 
		{
			method: 'get', 
			parameters: pars, 
			onComplete: searchUsersResponse
		});
}

function searchUsersResponse(originalRequest)
{
	var response = originalRequest.responseText;
	var results = $('results');
    results.innerHTML = response;
	var loading = $('loading');
	loading.style.display = 'none';
}