Gareth Adams

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html>	<head>		<title>Page Title</title>		<script type='text/javascript'>		</script>	</head>	<body>		<form action=''>			<input id='one' type='checkbox'>			<input id='two' type='checkbox'>		</form>		<script type='text/javascript'><!--function formMagic() {	this.initialCallbacks = []	this.dependency = function( element, target, condition, options ) {		// Turn first argument into an array of applicable elements		var elements = this.toElementArray(element);		// Turn first argument into an array of applicable elements		target = this.toFormElement(target);		if(!target) {return;}		var targetType = target.nodeName.toLowerCase() == 'input' ? target.type.toLowerCase() : target.nodeName.toLowerCase();		switch(targetType) {			case 'radio':			case 'checkbox':				for(var i = 0; i < elements.length; i++) {					var callback = this.checkableCallback(target, elements[i], condition);					this.addEvent(target, 'click', callback);					callback();				}		}	}	this.checkableCallback = function(target, dependent_element, value) {		return function(event) {			dependent_element.disabled = (target.checked == !value);			if(event) { kfm.log(event.type + ' ' + target.checked); }		}	}	this.toElementArray = function(arg) {		if(typeof arg == 'object' && arg.length) {			var out = [];			for(var i = 0; i < arg.length; i++) {				out[out.length] = this.toElement(arg[i]);			}			return out;		} else {			return [this.toElement(arg)];		}	}	this.toElement = function(arg) {		if(typeof arg == 'string') {			return document.getElementById(arg);		} else if(arg.nodeName) {			return arg;		} else {			return null;		}	}	this.toFormElement = function(arg) {		var element = this.toElement(arg);		var nn = element.nodeName ? element.nodeName.toLowerCase() : 'null';		switch(nn) {			case 'input':			case 'select':			case 'textarea':				return element;			default:				return null;		}	}	this.addEvent = function(obj, evType, fn){ 		if (obj.addEventListener){ 			obj.addEventListener(evType, fn, false); 			return true; 		} else if (obj.attachEvent){ 			var r = obj.attachEvent("on"+evType, fn); 			return r; 		} else { 			return false; 		} 	}	this.log = function(text) {		document.getElementById('log').innerHTML += text;		document.getElementById('log').innerHTML += "<br>";	}}// -->		</script>		<script type='text/javascript'>			window.kfm = new formMagic();			kfm.dependency('two', 'one', true);		</script>		<div id='log'></div>	</body></html>