var umiSaveFormData = new Class({
    Implements: [Options, Events],
    options: {
		'error_messages': 'error'
	},
    initialize: function (form){
		var params = Array.link(arguments, {options: Object.type, elements: $defined});
        this.setOptions(params.options || null);
		
		this.form = $(form);
		if(this.form){
  			var _self = this;
			var err = '.'+_self.options.error_messages;
			if(form.getElement(err)) _self.restoreFormData(_self.form);
				_self.saveFormData(_self.form);
		}
	},
	saveFormData: function(form) {
	
		if(!form) return false;
		if(!form.id) {
			alert("You should set id attribute in form tag to save or restore it.");
			return false;
		}

		var cookieData = new Array;	
		for(var i = 0; i < form.elements.length; i++) {
			var input = form.elements[i];
			var inputName = input.name.replace(/([)\\])/g, "\\$1");

			switch(input.type) {
				case "password": break;
				case "text":
				case "textarea": {
					cookieData.push({type: 'T', name: inputName, value: input.value});
					break;
				}
				case "checkbox":
				case "radio": {
					cookieData.push({type: 'C', name: inputName, value: (input.checked ? 1 : 0)});
					break;
				}
				case "select-multiple":
				case "select-one": {
					cookieData.push({type: 'S', name: inputName, value: input.selectedIndex});
					break;
				}
			}
		}
		
		var i, str = "";
		for(var i = 0; i < cookieData.length; i++) {
			var elementData = cookieData[i];
			var value = new String(elementData.value);
			var inputName = new String(elementData.name);
			if(!inputName || !value) continue;
			str += elementData.type + "," + inputName.length + "," + inputName + "," + value.length + "," + value;
		}
		
		document.cookie="frm" + form.id + "=" + escape(str.replace(/([|\\])/g, "\\$1"));
		return true;
	},

	restoreFormData: function(form) {
		if(!form) return false;
		
		if(!form.id) {
			alert("You should set id attribute in form tag to save or restore it.");
			return false;
		}
		var cookieName = "frm" + form.id + "=";
	
		var cookie = new String(unescape(document.cookie));
		var posStart, posEnd;
		if((posStart = cookie.indexOf(cookieName)) == -1) {
			return false;
		}
		
		if((posEnd = cookie.indexOf(";", posStart)) == -1) {
			posEnd = cookie.length;
		}
		
		var data = cookie.substring(posStart + cookieName.length, posEnd);
		var pos = 0, cookieData = new Array;

		while(pos < data.length) {
			var inputName;
			var type = data.substring(pos, pos + 1);
			pos += 2;
			
			var length = parseInt(data.substring(pos, data.indexOf(",", pos)));
			pos = data.indexOf(",", pos) + 1;
			var inputName = data.substring(pos, pos + length);
			pos += length + 1;

			var length = parseInt(data.substring(pos, data.indexOf(",", pos)));
			if(length == 0) {
				pos += 2;
				continue;
			} else {
				pos = data.indexOf(",", pos) + 1;
			}
			
			var value = data.substring(pos, pos + length);
			pos += length;
			
			cookieData.push({type: type, name: inputName, value: value});
		}
		
		for(var i = 0; i < cookieData.length; i++) {
			var elementData = cookieData[i];
			switch(elementData.type) {
				case "T": {
					form.elements[elementData.name].value = elementData.value;
					
					break;
					
				}
				case "C": {
					form.elements[elementData.name].checked = elementData.value ? true : false;
					break;
				}
				case "S": {
					form.elements[elementData.name].selectedIndex = elementData.value;
					
					break;
				}
			}
		}
	}

});


function saveFormData(){

}
function restoreFormData(){

}