function createRequestObject() {
			var ro;
			var browser = navigator.appName;
			if(browser == 'Microsoft Internet Explorer'){
				ro = new ActiveXObject('Microsoft.XMLHTTP');
			}else{
				ro = new XMLHttpRequest();
			}
			return ro;
		}
		
		var http = createRequestObject();
	
		function doInterest(t,i) {
			if (document.intform.email.value.indexOf('@')) {
				url = 'interested.php?' + t + '=' + i + '&name=' + escape(document.intform.name.value) + '&email=' + escape(document.intform.email.value) + '&tel=' + escape(document.intform.tel.value);
				http.open('get', url);
				http.onreadystatechange = function() {
					makeInterest(t);
				}
				http.send(null);
			}
		}
		
		function makeInterest(t) {
			if(http.readyState == 4){
				var r = http.responseText;
				if (r=='1') {
					document.getElementById('interested').innerHTML='Your interest in this ' + (t=='ex_id'?'exhibition':'photo') + ' has been sent to the gallery.';
					document.intform.name.value = '';
					document.intform.email.value = '';
					document.intform.tel.value = '';
				} else {
					alert(r);
				}
			}
		}