// JavaScript Document
String.prototype.trim = function(){
	return this.replace(/(^\s*)|(\s*$)/g, ""); 
}
var FormValidate = {};
(function($){
	var Require = /.+/;
	var Email = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
	var Phone = /^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$/;
	var Url = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/;
	var QQ = /^[1-9]\d{4,8}$/;
	var Num = "$.$checkNumber('Number',obj,rule)";
	var Int = "$.$checkNumber('Int',obj,rule)";
	var Double = "$.$checkNumber('Double',obj,rule)";
	var English = /^[A-Za-z]+$/;
	var Chinese =  /^[\u0391-\uFFE5]+$/;
	var Username = "$.$checkUsername(obj,rule)";
	var Filter = "$.$doFilter(obj,rule)";
	var Date = "$.$isDate(obj, rule)";
	var Repeat = "$.$repeat(form,obj,rule)";
	var Range = "getAttribute('min') < (value|0) && (value|0) < getAttribute('max')";
	var Compare = "$.$compare(value,getAttribute('operator'),getAttribute('to'))";
	var Custom = "$.$regexp.test(obj.value)";
	var Group = "$.$mustChecked(obj,rule)";
	
	$.onPass = null;
	$.onUnpass = null;
	
	var errList = [];
	
	$.$validate = function(form,rules,mode){
		errList.length = 0;
		
		mode = mode || 1;
		/*----------------------------
		1,全部检查,并alert
		2,一个一个检查，并alert,focus
		3,调用自定义事件 onPassFun验证通过时调用，onUnpassFun未通过时调用。
		----------------------------*/		
		
		var f,rule;
		for(var i=0;i<rules.length;i++){
			rule = rules[i];
			if(rule == undefined) continue;
			
			f = $.$check(form,rule);
			
			if(mode == 2 && f === false){
				alert(rule.msg);
				try{form[rule.name].select();}catch(e){};
				try{
					form[rule.name].focus();
				}catch(e){
					form[rule.name][0].focus();
				}
				return false;
			}else if(mode == 3 && f === true){
				typeof($.onPass) == "function" ? $.onPass(form[rule.name],rule) : null;
			}else if(mode == 3 && f === false){
				$.$addError(rule);
				typeof($.onUnpass) == "function" ? $.onUnpass(form[rule.name],rule) : null;
			}			
		}
		
		if(mode == 1 && errList.length != 0){
			alert($.$errToString());
			return false;
		}else if(mode == 1){
			return true;
		}else if(mode == 3 && errList.length !=0){
			return false;	
		}else if(mode == 3){
			return true;
		}		
	}
	
	
	$.$check = function(form,rule){
		if(typeof rule.name == "string")
			obj = form[rule.name];
		else
			return null;
		
		if(obj == undefined) return null;// Note :not return false!
		//如果不是必填项，radio,checkbox,option可不向下检查。
		//如果不是必填项，除radio,checkbox,option外，如果值为空的话，可不向下检查。
		if(!(rule.required == true || rule.type=="Require") && (obj.length != undefined || obj.value == "")){
			//if(rule.required != true && (obj.length != undefined || obj.value == "")){
			//alert(rule.name + " " + rule.required + " " + obj.length);
			return true;
		}else if(rule.required == true && obj.length == undefined && !eval(Require.test(obj.value.trim()))){
			$.$addError(rule);
			return false;
		}
		
		if(rule.type == undefined && rule.required !== true) return;
		var type = rule.type
		
		switch(type){
			case "Date" :
			case "Repeat" :
			case "Range" :
			case "Compare" :
			case "Custom" :
			case "Group" : 
			case "Limit" :
			case "LimitB" :
			case "SafeString" :
			case "Filter" :
			case "Int":
			case "Double":
			case "Num":
			case "Username":
			case "Repeat":
				if(!eval(eval(type))){
					$.$addError(rule);
					return false;
				}else return true;
				break;
			default :
				if(type && !eval(type).test(obj.value)){
					$.$addError(rule);
					return false;
				}else{
					if(type == "Require" || rule.required == true){
						var min = (typeof rule.min != "number") ? 1 : rule.min;
						var max = (typeof rule.max != "number") ? "" : rule.max;
						var reg = new RegExp("^.{" + min + "," + max + "}$");
						
						//Textarea 换行
						//IE,opera /r
						//FF,Safari /n
						if(reg.test(obj.value.replace(/[\r|\n]/g,"").trim())){
							return true;
						}else{
							$.$addError(rule);
							return false;
						}
					}else
						return true;
				}
				break;
		}
	}
	
	
	$.$isDate = function(obj,rule){
		var r = obj.value.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
		if(r==null) return false;
		var d = new Date(r[1], r[3]-1, r[4]);
		return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);		
	}
	
	
	$.$mustChecked = function(obj,rule){
		var o;
		var min_ = rule.min || 1 ,max_ = rule.max || obj.length;
		
		var cn = 0;
		
		for(var i=0;o = obj[i];i++){
			if(o.checked != undefined){//Radio,CheckBox
				if(o.checked)
					cn++;
			}else{
				var noSelected = rule.noSelected || "";
				if(o.selected && noSelected == o.value) return false;
				else if(o.selected) cn++;
			}
		}
		
		if(cn >= min_ && cn <= max_ ) return true;
		else return false;
	}
	
	
	
	$.$checkNumber = function(type,obj,rule){
		var f;
		switch(type){
			case "Int":
				f =  /^[-\+]?\d+$/.test(obj.value);
				break;
			case "Double":
				f = /^[-\+]?\d+(\.\d+)?$/.test(obj.value);
				break;
			case "Number":
				f = !isNaN(Number(obj.value));
				break;
		}
		
		if(!f) return false;
		
		var min = (typeof rule.min != "number") ? Number.NEGATIVE_INFINITY : rule.min;
		var max = (typeof rule.max != "number") ? Number.POSITIVE_INFINITY : rule.max;
		
		
		//var min = rule.min | Number.NEGATIVE_INFINITY, max = rule.max | Number.POSITIVE_INFINITY;
		// 0 | null = 0   'a' | -2 = -2   -2 | 'a' = -2    'a' | 'a' = 0
		//用这个来判断数字。还可以。
		
		if(obj.value >= min && obj.value <= max)
			return true;
		else
			return false;
	}
	
	
	$.$checkUsername = function(obj,rule){
		var min = rule.min || 3 ,max = rule.max || "";
		var reg = new RegExp("^\\w{" + min + "," + max + "}$","i");
		return reg.test(obj.value);
	}
	
	$.$doFilter = function(obj, rule){
		return new RegExp("^.+\.(?=EXT)(EXT)$".replace(/EXT/g, rule.accept.split(/\s*,\s*/).join("|")), "gi").test(obj.value);
	}
	
	$.$repeat = function(form,obj,rule){
		return form[rule.to].value == obj.value;
	}
	
	$.$addError = function(rule){
		errList.push(rule);
	}
	
	$.$errToString = function(){
		var t = "",rule;
		for(var i=0;rule = errList[i];i++)
			t += (i + 1) + ". " + rule.msg + "\n";
		
		return t;
	}
})(FormValidate)

var form = document.forms["testForm"];
var rules = [
	{name:"person",			required:true,		msg:"请填写您的姓名"},
	{name:"tel",			required:true,		min:7,			msg:"请填写您的电话或手机，号码长度应该大于7位"},
	{name:"content",		required:true,		msg:"请填写留言内容"},
	{name:"validatecode",	required:true,		type:"Int",		msg:"请正确的输入验证码"}
];
var mode;
var span_ = document.createElement("SPAN");
	span_.className = "error";
FormValidate.onPass = function(obj,rule){
	obj_ = obj.parentNode || obj[obj.length -1].parentNode;
	try{
		obj_.removeChild(obj_.errorTip);
		obj_.errorTip = null
	}catch(e){}
}
FormValidate.onUnpass = function(obj,rule){
	obj_ = obj.parentNode || obj[obj.length -1].parentNode;
	if(!obj_.errorTip){
		obj_.errorTip = span_.cloneNode(true);
		obj_.appendChild(obj_.errorTip);
		obj_.errorTip.innerHTML = rule.msg;
	}
}
function vControl(pChoice,pParm){
	switch(pChoice){
		case "CHECKFORM":
			//Validator.validate(pParm,rules)的效果等同于mode的值为：1
			//如果mode为3时，会执行onPass或onUnpass事件
			f = FormValidate.$validate(pParm,rules,mode);
			if(f===false)
				return false;
			else
				return true;
			break;
	}
}