// JavaScript Document
  
var Form = function(sForm){
	this._form = document.forms[sForm];
	}
	  
Form.prototype = {
	formats : {
		datetime : /[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}/ /*2008-05-26 06:48:35*/ ,
		date : /[0-9]{4}-[0-9]{2}-[0-9]{2}/ /*2008-05-26*/ , 	
		time : /[0-9]{2}:[0-9]{2}:[0-9]{2}/ /*06:48:35*/ , 		
		shorttime : /[0-9]{2}:[0-9]{2}/ /*06:48*/ , 		
		word : /^\w+$/ /*hello, Nelis*/ , 				
		number : /^\d+$/ /*1, 23*/ , 			 			 		
		letter : /^[a-z][A-Z]$/ /*a, B*/ ,  					
		email : /^(.+?)\@(.+?)\.(.+?)$/ /*mynelis@gmail.com*/ , 
		notempty : /.+/ /*any-thing_goes*/ 
	},
		  
	getValueOf : function(oElem){
		switch(oElem.type.toLowerCase()){
			case 'text': /*for text inputs*/
			case 'textarea': /*and textarea inputs*/
				return oElem.value;
				break;
					
			case 'radio': /*for radion inputs, look for the first selected with same name*/
				var e, el;
				for(e=0; e<this._form.elements.length; e=e+1){
					el = this._form.elements[e]; 
					if(el.type.toLowerCase() == 'radio' && el.name == oElem.name && el.checked == true) return el.value;
					}
					break;
					
			case 'checkbox': /*for check boxes, look for all checked with same name*/
				var e, el, ret = new Array();
				for(e=0; e<this._form.elements.length; e=e+1){
					el = this._form.elements[e]; 
					if(el.type.toLowerCase() == 'checkbox' && el.name == oElem.name && el.checked == true) ret.push(el.value);
					}
				return ret.join(',');
				break;
					
			case 'select-one': /*for single select options*/
				return oElem.options[oElem.options.selectedIndex].value;
				break;
					
			case 'select-multiple': /*for multiple select options, look for all selected*/
				var e, el, ret = new Array();
				for(e=0; e<oElem.options.length; e=e+1){
					el = oElem.options[e]; 
					if(el.selected == true) ret.push(el.value);
					}
				return ret.join(',');
				break;
					
			default: /*for other element types*/
				return oElem.value;
				break;
			}
		},
				
	Validate : function(){
		var e, el, elval, elformat;
		for(e=0; e<this._form.elements.length; e=e+1){
			el = this._form.elements[e];
			if(!el.name) continue;
			if(el.name.indexOf(':') == -1) continue;
			var chunks = el.name.split(':');
			elformat = chunks[1];                
			var elLabel = (chunks[2] !== undefined) ? chunks[2] : chunks[0];
			elval = this.getValueOf(el);
			 if(!this.formats[elformat].test(elval)){
				alert('Invalid '+elLabel);
				el.focus();
				return false;
				}
			}		
			return true;
		},
				
	Collect : function(){
		if(this.Validate()){
			var e, ret=new Array();
			for(e=0; e<this._form.elements.length; e=e+1){
				if(this._form.elements[e].name.indexOf(':') > -1){
					this._form.elements[e].name = this._form.elements[e].name.split(':', 2)[0];
					}
				var v = this.getValueOf(this._form.elements[e]);
				v = v.replace(/\&/g, '_amps;');
				v = v.replace(/\=/g, '_equal;');
				ret.push(this._form.elements[e].name+'='+v);
				}
			return ret.join('&');
			}
		else{
			return false;
			}
		},
				
	Submit : function(){
		this.Validate();		
		var e;
		for(e=0; e<this._form.elements.length; e=e+1){
			if(this._form.elements[e].name.indexOf(':') > -1){
				this._form.elements[e].name = this._form.elements[e].name.split(':', 2)[0];
				}
			}
		this.submit ( );
		},
				
		Reset : function(){
			this._form.reset();
			return false;
		}
  }