View = {
	getValue: function(id) {
		return document.getElementById(id).value;
	},

	setValue: function(id, value) {
		document.getElementById(id).value = value;
	},

	getAttribute: function(id, attribute) {
		return (document.getElementById(id) ? document.getElementById(id).getAttribute(attribute) : null);
	},

	setAttribute: function(id, attribute, value) {
		if(document.getElementById(id)) {
			eval('document.getElementById(id).' + attribute + ' = ' + value);
			return this.getAttribute(id, attribute);
		}
	},
	
	addClass: function(id, className)
	{
		if(typeof(id) == 'string') {
			elementObj = document.getElementById(id);
		} else if(typeof(id) == 'object') {
			elementObj = id;
		}
		if(elementObj != null) {
			elementObj.className += ' ' + className;
		}
	},
	
	removeClass: function(id, className) 
	{
		classNamePattern = new RegExp('\s*(' + className + ')');
		if(typeof(id) == 'string') {
			elementObj = document.getElementById(id);
		} else if(typeof(id) == 'object') {
			elementObj = id;
		}
		if(elementObj != null) {
			elementObj.className = elementObj.className.replace(classNamePattern, '');
		}
	},	
	checkClass: function(id, className) 
	{
		classNamePattern = new RegExp('\s*(' + className + ')');
		elementObj = document.getElementById(id);
		if(elementObj != null) {
			return classNamePattern.test(elementObj.className);
		}
	},
	
	showErrors: function(errorIds)
	{
		var errorsArray = Array(errorIds);
		if(errorsArray != null) {
			for(i=0;i < errorsArray.length; i++) {
				var errorObj = document.getElementById(errorsArray[i]);
				if(errorObj != null) {
					this.removeClass(errorsArray[i], 'active');
					this.addClass(errorsArray[i], 'active');
				}
			}
		}
	},

	clearErrors: function(errorIds)
	{
		if(errorIds != null) {
			for(i=0;i < errorIds.length; i++) {
				var errorObj = document.getElementById(errorIds[i]);
				if(errorObj != null) {
					this.removeClass(errorIds[i], 'active');
				}
			}
		}
	},
	getInstance: function(id) {
		return (document.getElementById(id) ? document.getElementById(id) : null);
	},
	getElementsBySelector: function(selector) {
		// Attempt to fail gracefully in lesser browsers
		if (!document.getElementsByTagName) {
			return new Array();
		}
		// Split selector in to tokens
		var tokens = selector.split(' ');
		var currentContext = new Array(document);
		for (var i = 0; i < tokens.length; i++) {
			token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
			if (token.indexOf('#') > -1) {
				// Token is an ID selector
				var bits = token.split('#');
				var tagName = bits[0];
				var id = bits[1];
				var element = document.getElementById(id);
				if (tagName && element.nodeName.toLowerCase() != tagName) {
					// tag with that ID not found, return false
					return new Array();
				}
				// Set currentContext to contain just this element
				currentContext = new Array(element);
				continue; // Skip to next token
			}
			if (token.indexOf('.') > -1) {
				// Token contains a class selector
				var bits = token.split('.');
				var tagName = bits[0];
				var className = bits[1];
				if (!tagName) {
					tagName = '*';
				}
				// Get elements matching tag, filter them for class selector
				var found = new Array;
				var foundCount = 0;
				for (var h = 0; h < currentContext.length; h++) {
					var elements;
					if (tagName == '*') {
						elements = this.getAllChildren(currentContext[h]);
					} else {
						elements = currentContext[h].getElementsByTagName(tagName);
					}
					for (var j = 0; j < elements.length; j++) {
						found[foundCount++] = elements[j];
					}
				}
				currentContext = new Array;
				var currentContextIndex = 0;
				for (var k = 0; k < found.length; k++) {
					if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
						currentContext[currentContextIndex++] = found[k];
					}
				}
				continue; // Skip to next token
			}
			// Code to deal with attribute selectors
			if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
				var tagName = RegExp.$1;
				var attrName = RegExp.$2;
				var attrOperator = RegExp.$3;
				var attrValue = RegExp.$4;
				if (!tagName) {
					tagName = '*';
				}
				// Grab all of the tagName elements within current context
				var found = new Array;
				var foundCount = 0;
				for (var h = 0; h < currentContext.length; h++) {
					var elements;
					if (tagName == '*') {
						elements = this.getAllChildren(currentContext[h]);
					} else {
						elements = currentContext[h].getElementsByTagName(tagName);
					}
					for (var j = 0; j < elements.length; j++) {
						found[foundCount++] = elements[j];
					}
				}
				currentContext = new Array;
				var currentContextIndex = 0;
				var checkFunction; // This function will be used to filter the elements
				switch (attrOperator) {
					case '=': // Equality
						checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
						break;
					case '~': // Match one of space seperated words 
						checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
						break;
					case '|': // Match start with value followed by optional hyphen
						checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
						break;
					case '^': // Match starts with value
						checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
						break;
					case '$': // Match ends with value - fails with "Warning" in Opera 7
						checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
						break;
					case '*': // Match ends with value
						checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
						break;
					default :
						// Just test for existence of attribute
						checkFunction = function(e) { return e.getAttribute(attrName); };
				}
				currentContext = new Array;
				var currentContextIndex = 0;
				for (var k = 0; k < found.length; k++) {
					if (checkFunction(found[k])) {
						currentContext[currentContextIndex++] = found[k];
					}
				}
				// alert('Attribute Selector: '+tagName+' '+attrName+' '+attrOperator+' '+attrValue);
				continue; // Skip to next token
			}
			if (!currentContext[0]){
				return;
			}

			// If we get here, token is JUST an element (not a class or ID selector)
			tagName = token;
			var found = new Array;
			var foundCount = 0;
			for (var h = 0; h < currentContext.length; h++) {
				var elements = currentContext[h].getElementsByTagName(tagName);
				for (var j = 0; j < elements.length; j++) {
					found[foundCount++] = elements[j];
				}
			}
			currentContext = found;
		}
		return currentContext;
	},
	getAllChildren: function (e)
	{
		// Returns all children of element. Workaround required for IE5/Windows. Ugh.
		return e.all ? e.all : e.getElementsByTagName('*');
	}
}