var xhr = new Array(); // ARRAY OF XML-HTTP REQUESTS
var xi = new Array(0); // ARRAY OF XML-HTTP REQUEST INDEXES
xi[0] = 1; // FIRST INDEX SET TO 1 MAKING IT AVAILABLE


function xhrRequest(type) {
	if (!type) {
		type = 'html';
	}

	// xhrsend IS THE xi POSITION THAT GETS PASSED BACK
	// INITIALIZED TO THE LENGTH OF THE ARRAY(LAST POSITION + 1)
	// IN CASE A FREE RESOURCE ISN'T FOUND IN THE LOOP
	var xhrsend = xi.length;

	// GO THROUGH AVAILABLE xi VALUES
	for (var i=0; i<xi.length; i++) {

		// IF IT'S 1 (AVAILABLE), ALLOCATE IT FOR USE AND BREAK
		if (xi[i] == 1) {
			xi[i] = 0;
			xhrsend = i;
			break;
		}
	}

	// SET TO 0 SINCE IT'S NOW ALLOCATED FOR USE
	xi[xhrsend] = 0;

	// SET UP THE REQUEST
	if (window.ActiveXObject) {
		try {
			xhr[xhrsend] = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xhr[xhrsend] = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	} else if (window.XMLHttpRequest) {
		xhr[xhrsend] = new XMLHttpRequest();
		if (xhr[xhrsend].overrideMimeType) {
			xhr[xhrsend].overrideMimeType('text/' + type);
		}
	}
	return (xhrsend);
}

function sample() {
	var xhri = xhrRequest('html');
	var qry = '';
	var url = '';
	xhr[xhri].open('POST', url, true);
	xhr[xhri].onreadystatechange = function () {
			if (xhr[xhri].readyState == 4 && xhr[xhri].status == 200) {
				xi[xhri] = 1;
				xhr[xhri] = null;
			} else {
				try {
					var alertStr = "xhr[xhri].readyState=" + xhr[xhri].readyState + " xhr[xhri].status=" + xhr[xhri].status;
					//alert(alertStr);
				}
				catch (e) {
					var alertStr = "error getting xhr[xhri].readyState and xhr[xhri].status";
					//alert(alertStr);
				}
			}
		};
	xhr[xhri].setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xhr[xhri].send(qry);
}

//
// SCROLLING
//

function stop_scroll() {
	clearInterval(scroller);
}

function toggle_arrow(side) {
	if (!side) side = window.event; // fix for IE
	if (side == 'left') {
		if (document.getElementById('arrowleft').src.substr(document.getElementById('arrowleft').src.lastIndexOf('/')) == '/arrowleft.gif') {
			document.getElementById('arrowleft').src = 'pics/arrowleftw.gif';
		} else {
			document.getElementById('arrowleft').src = 'pics/arrowleft.gif';
		}
	} else {
		if (document.getElementById('arrowright').src.substr(document.getElementById('arrowright').src.lastIndexOf('/')) == '/arrowright.gif') {
			document.getElementById('arrowright').src = 'pics/arrowrightw.gif';
		} else {
			document.getElementById('arrowright').src = 'pics/arrowright.gif';
		}
	}
}

//
// SCROLLING PHOTOGRAPHS
//

function scroll_right() {
	scroller = setInterval(function() {
		var temp_var = js_ids.shift();
		js_ids.push(temp_var);
		temp_var = js_filenames.shift();
		js_filenames.push(temp_var);
		temp_var = js_titles.shift();
		js_titles.push(temp_var);
		var out_string = '<table cellpadding="8px"><tr>';
		for (var i=0; i<=(js_ids.length - 1); i++) {
			out_string += '<td><a onclick="display(\'' + js_ids[i] + '\')"><img class="sample" src="portfolio/thumbs/' + js_filenames[i] + '" alt="' + js_titles[i] + '" title="' + js_titles[i] + '" height="40px" /></a></td>';
		}
		out_string += '</tr></table>';
		document.getElementById('samples').innerHTML = out_string;
	}, 500);
}

function scroll_left() {
	scroller = setInterval(function() {
		temp_var = js_ids.pop();
		js_ids.unshift(temp_var);
		temp_var = js_filenames.pop();
		js_filenames.unshift(temp_var);
		temp_var = js_titles.pop();
		js_titles.unshift(temp_var);
		var out_string = '<table cellpadding="8px"><tr>';
		for (var i=0; i<=(js_ids.length - 1); i++) {
			out_string += '<td><a href="#" onclick="display(\'' + js_ids[i] + '\')"><img class="sample" src="portfolio/thumbs/' + js_filenames[i] + '" alt="' + js_titles[i] + '" title="' + js_titles[i] + '" height="40px" /></a></td>';
		}
		out_string += '</tr></table>';
		document.getElementById("samples").innerHTML = out_string;
	}, 500);
}

//
// SCROLLING VIDEOS
//

function scroll_left_v() {
	scroller = setInterval(function() {
		var temp_var = js_ids.shift();
		js_ids.push(temp_var);
		temp_var = js_thumbnames.shift();
		js_thumbnames.push(temp_var);
		temp_var = js_filenames.shift();
		js_filenames.push(temp_var);
		temp_var = js_titles.shift();
		js_titles.push(temp_var);
		var out_string = '<table cellpadding="8px"><tr>';
		for (var i=0; i<=(js_ids.length - 1); i++) {
			out_string += '<td><a onclick="display_video(\'' + js_ids[i] + '\')"><img class="sample" src="portfolio/video_thumbs/' + js_thumbnames[i] + '" alt="' + js_titles[i] + '" title="' + js_titles[i] + '" height="40px" /></a></td>';
		}
		out_string += '</tr></table>';
		document.getElementById('samples').innerHTML = out_string;
	}, 500);
}

function scroll_right_v() {
	scroller = setInterval(function() {
		temp_var = js_ids.pop();
		js_ids.unshift(temp_var);
		temp_var = js_filenames.pop();
		js_filenames.unshift(temp_var);
		temp_var = js_titles.pop();
		js_titles.unshift(temp_var);
		var out_string = '<table cellpadding="8px"><tr>';
		for (var i=0; i<=(js_ids.length - 1); i++) {
			out_string += '<td><a onclick="display_video(\'' + js_ids[i] + '\')"><img class="sample" src="portfolio/video_thumbs/' + js_filenames[i] + '" alt="' + js_titles[i] + '" title="' + js_titles[i] + '" height="40px" /></a></td>';
		}
		out_string += '</tr></table>';
		document.getElementById("samples").innerHTML = out_string;
	}, 500);
}

//
// DISPLAY PHOTOGRAPH
//

function display(id) {
	if (!id) id = window.event; // fix for IE
	var xhri = xhrRequest('html');
	var qry = 'js=y&id=' + id;
	var url = 'php/display_item.php';
	xhr[xhri].open('POST', url, true);
	xhr[xhri].onreadystatechange = function () {
			if (xhr[xhri].readyState == 4 && xhr[xhri].status == 200) {
				document.getElementById('viewport').innerHTML = xhr[xhri].responseText;
				xi[xhri] = 1;
				xhr[xhri] = null;
			} else {
				try {
					var alertStr = "xhr[xhri].readyState=" + xhr[xhri].readyState + " xhr[xhri].status=" + xhr[xhri].status;
					//alert(alertStr);
				}
				catch (e) {
					var alertStr = "error getting xhr[xhri].readyState and xhr[xhri].status";
					//alert(alertStr);
				}
			}
		};
	xhr[xhri].setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xhr[xhri].send(qry);
}

//
// DISPLAY video
//

function display_video(id) {
	if (!id) id = window.event; // fix for IE
	var xhri = xhrRequest('html');
	var qry = 'js=y&id=' + id;
	var url = 'php/display_video.php';
	xhr[xhri].open('POST', url, true);
	xhr[xhri].onreadystatechange = function () {
			if (xhr[xhri].readyState == 4 && xhr[xhri].status == 200) {
				document.getElementById('viewport').innerHTML = xhr[xhri].responseText;
				xi[xhri] = 1;
				xhr[xhri] = null;
			} else {
				try {
					var alertStr = "xhr[xhri].readyState=" + xhr[xhri].readyState + " xhr[xhri].status=" + xhr[xhri].status;
					//alert(alertStr);
				}
				catch (e) {
					var alertStr = "error getting xhr[xhri].readyState and xhr[xhri].status";
					//alert(alertStr);
				}
			}
		};
	xhr[xhri].setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xhr[xhri].send(qry);
}

function insert_movie() {
	var thisElement = document.getElementById('this_video');
	var vname = thisElement.name;
	var vwidth = thisElement.width;
	var vheight = thisElement.height;
	document.write('<object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab" width="' + vwidth + '" height="' + vheight + '">');
	document.write('<param name="src" value="portfolio/video/' + vname + '" />');
	document.write('<param name="controller" value="true" />');
	document.write('<param name="target" value="myself" />');
	document.write('<param name="autoplay" value="false" />');
	document.write('<!--[if !IE]>-->');
	document.write('<object type="video/quicktime" data="portfolio/video/' + vname + '" width="' + vwidth + '" height="' + vheight + '">');
	document.write('<param name="autoplay" value="false" />');
	document.write('<param name="target" value="myself" />');
	document.write('<param name="controller" value="true" />');
	document.write('</object>');
	document.write('<!--<![endif]-->');
	document.write('</object>');
}

//
// MESSAGE VALIDATION
//

function validate_contact(form) {
	if (!form) form = window.event; // fix for IE
	var n_valid = false;
	var e_valid = false;
	var m_valid = false;
	n_valid = validate_name(form.name);
	e_valid = validate_email(form.email);
	m_valid = validate_message(form.message);
	if ((n_valid == false) || (e_valid == false) || (m_valid == false)) {
		return false;
	} else {
		return true;
	}
}

function validate_name(nameElement) {
	if (!nameElement) nameElement = window.event; // fix for IE
	if (nameElement.value == '') {
		document.getElementById("name_error").style.visibility = "visible";
		document.getElementById("name_error").style.display = "block";
		nameElement.focus();
		nameElement.select();
		return false;
	} else {
		document.getElementById("name_error").style.visibility = "hidden";
		document.getElementById("name_error").style.display = "none";
		return true;
	}
}

function validate_email(emailElement) {
	if (!emailElement) emailElement = window.event; // fix for IE
	if (emailElement.value == '') {
		document.getElementById("email_error").style.visibility = "visible";
		document.getElementById("email_error").style.display = "block";
		document.getElementById("email_error").innerHTML = "Please enter your email address"
		emailElement.focus();
		emailElement.select();
		return false;
	} else {
		var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
		if(reg.test(emailElement.value) == false) {
			document.getElementById("email_error").style.visibility = "visible";
			document.getElementById("email_error").style.display = "block";
			document.getElementById("email_error").innerHTML = "The email address you entered does not appear to be valid!"
			emailElement.focus();
			emailElement.select();
			return false;
		} else {
			document.getElementById("email_error").style.visibility = "hidden";
			document.getElementById("email_error").style.display = "none";
			document.getElementById("email_error").innerHTML = ""
			return true;
		}
	}
}

function validate_message(messageElement) {
	if (!messageElement) messageElement = window.event; // fix for IE
	if (messageElement.value == '') {
		document.getElementById("message_error").style.visibility = "visible";
		document.getElementById("message_error").style.display = "block";
		messageElement.focus();
		messageElement.select();
		return false;
	} else {
		document.getElementById("message_error").style.visibility = "hidden";
		document.getElementById("message_error").style.display = "none";
		return true;
	}
}