// 26-07-2007 - AL - created this function to get all the states for each country using AJAX
// requires country and state select boxes. example in signup.php

function requestInstitutions(countryField, stateField, institutionField) {
	var s = document.getElementById(countryField);
	var m = s.options[s.options.selectedIndex].value;
	var url = '../include/get_institutions.php?country_id=' + m;
			
		var httpRequest;
        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
                } 
                catch (e) {
                           try {
                                httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                               } 
                             catch (e) {}
                          }
                                       }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
		httpRequest.onreadystatechange = function() { alertInstitutions(httpRequest, institutionField); };
		httpRequest.open('GET', url, true);
		httpRequest.send(null);
}
	
function requestInstitutionsByState(countryField, stateField, institutionField) {
	var s = document.getElementById(stateField);
	var m = s.options[s.options.selectedIndex].value;
	var url = '../include/get_institutions.php?state_id=' + m;
	var httpRequest;
	if (window.XMLHttpRequest) { // Mozilla, Safari, ...
		httpRequest = new XMLHttpRequest();
		if (httpRequest.overrideMimeType) {
			httpRequest.overrideMimeType('text/xml');
			// See note below about this line
		}
	} 
	else if (window.ActiveXObject) { // IE
		try {
			httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch (e) {
					   try {
							httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
						   } 
						 catch (e) {}
					  }
								   }

	if (!httpRequest) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	httpRequest.onreadystatechange = function() { alertInstitutions(httpRequest, institutionField); };
	httpRequest.open('GET', url, true);
	httpRequest.send(null);

}

function alertInstitutions(httpRequest, institutionField) {

	if (httpRequest.readyState == 4) {
		if (httpRequest.status == 200) {
			document.getElementById(institutionField + '_select').innerHTML = httpRequest.responseText;
			document.getElementById('ajax_loader_ins').style.display = 'none';
		} else {
			alert('There was a problem with the request.');
		}
	}

}

function otherInstitution(institutionField) {
	var s = document.getElementById(institutionField);
	var m = s.options[s.options.selectedIndex].value;
	if (m == 'other') { document.getElementById('other_institution').style.display = 'block'; }
	else { document.getElementById('other_institution').style.display = 'none'; }
}