/*-------------------------------------------------
Title:		BFI JavaScript functions
Author:		John Reed, john@studiobonito.com
Updated:	January 16 2008
------------------------------------------------- */


// add load event function
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}


// get elements by class name function
var getElementsByClassName = function (className, tag, elm) {
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};

// simple function to return an element's id
function get(id) {
	return document.getElementById(id);
}

function popup(url,w,h,full) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	var popupProps = 'width='+w+',height='+h+',left='+winl+',top='+wint;
	
	if(full) {
		popupProps += 'resizable=1,status=1,menubar=1,toolbar=1,scrollbars=1,location=1,directories=1';
	}
	
	window.open(url,'popup',popupProps);
}





// simple toggle
function toggle(id,select,condition) {
	if (!document.getElementById) return;
		
	var element = document.getElementById(id);
	
	if(select) {
		if(select.value == condition) {
			if(navigator.appName.indexOf("Microsoft") > -1) {
				element.style.display = 'block';
			}
	
			else {
				if(element.nodeName == 'TBODY') {
					element.style.display = 'table-row-group';
				}
				
				else {
					element.style.display = 'block';
				}
			}
		}
		
		else {
			element.style.display = 'none';
		}
	} else {
		if(element.style.display == 'none') {
			if(navigator.appName.indexOf("Microsoft") > -1) {
				element.style.display = 'block';
			}
	
			else {
				if(element.nodeName == 'TBODY') {
					element.style.display = 'table-row-group';
				}
				
				else {
					element.style.display = 'block';
				}
			}
		} else {
			element.style.display = 'none';
		}
	}
}





// simple show
function show(id) {
	if (!document.getElementById) return;
		
	var element = document.getElementById(id);
	
	if(navigator.appName.indexOf("Microsoft") > -1) {
		element.style.display = 'block';
	}

	else {
		if(element.nodeName == 'TABLE') {
			element.style.display = 'table';
		}
		
		else if(element.nodeName == 'TR') {
			element.style.display = 'table-row';
		}

		else if(element.nodeName == 'TBODY') {
			element.style.display = 'table-row-group';
		}
		
		else {
			element.style.display = 'block';
		}
	}
}




// simple hide
function hide(id) {
	if (!document.getElementById) return;
		
	var element = document.getElementById(id);
	
	element.style.display = 'none';
}





// prepares links based on XML "rel" attribute
function prepareLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		
		// prepare external links
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") {
			anchor.target = "_blank";
		}

		// prepare close window links
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "close") {
			anchor.onclick = function() {
				window.close();
			}
		}

		// prepare print window links
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "print") {
			anchor.onclick = function() {
				window.print();
			}
		}
	}
	
	get('paypal').target = "_blank";

/*
	get('donate').onclick = function() {
		get('paypal').submit();
		return false;
	}
*/
}





// simple error checking
function verify(formid) {
	if(document.getElementById(formid)) {
		
		var theForm = document.getElementById(formid);
		var labels = document.getElementsByTagName('LABEL');
		var agree = document.getElementById('agree');
		var error = 0;
		
		for (x = 0; x < theForm.elements.length; x++) {
			if (theForm.elements[x].className == "required") {
				if ((theForm.elements[x].type == "text") || (theForm.elements[x].type == "textarea") || (theForm.elements[x].type == "select-one")) {
					if (theForm.elements[x].value == "") {
						get(theForm.elements[x].id + 'Label').className = 'error';
						get('error').style.display = 'block';
						error = 1;
					} else {
						get(theForm.elements[x].id + 'Label').className = '';
					}
				}
			}
		}
		
		// if required fields aren't filled out
		if (error == 1) {
			alert("You must fill out all required fields before you can submit your application.");
			return false;
		}
		
			// email validation
			var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
			var address = get('email').value;
			
			if(reg.test(address) == false) {
				get('emailLabel').className = 'error';
				alert("You have entered an invalid email address. Please try again.");
				get('email').focus();
				return false;
			}
	}
}




// email validation
function validate(email) {
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var address = email.value;
	
	if(reg.test(address) == false) {
		alert("You have entered an invalid email address. Please try again.");
	}
}



// load events
addLoadEvent(prepareLinks);