//共用，主物件
function FormObject(_form){
    this.form=_form;
        
    this.item=new Array();
    this.add=function(_item){
    	this.item[this.item.length]=_item;
    }		 
    this.checkData=function(){
    	try{ 
    		for(var i=0;i<this.item.length;i++){
    		   this.item[i].checkData(this.form);
    		}
    		eval(this.form+".submit();");
    	}catch(e){
    		//this.executeObject.focus();
    		throw new Error(e.message);
    		 
    	}	 
    }		 
}	

//共用，判斷是不是空值		 
function isEmpty(_arg){
    for (var i = 0; i < _arg.length; i++){
    	if (_arg.charAt(i)!=" "){
    		return false;
    	}	 
    }		 
    return true;
}
//下拉選單
function SelectField(_fieldName, _errorMessage) {
	return new SelectObject(_fieldName, _errorMessage);
}
function SelectObject(_fieldName, _errorMessage) { 
	this.fieldName = _fieldName;
	this.errorMessage= _errorMessage;
	this.checkData = function(_form) {
		var form=eval(_form+"."+this.fieldName);
		
		//空值
		if (form.options.length==0) {
			this.errorMessage += "欄位未選";
			throw new Error(this.errorMessage);
		}
		if (form.selectedIndex==-1 || isEmpty( form.options[ form.selectedIndex ].value ) ) {
			this.errorMessage += "欄位未選";
			throw new Error(this.errorMessage);
		}
		return true;
	}
}
	
//日期欄位
function DateField(_fieldName,_formate,_errorMessage){
	return new DateObject(_fieldName,_formate,_errorMessage);
}
function DateObject(_fieldName,_format,_errorMessage){
	this.fieldName=_fieldName;
	this.format=_format;
    this.errorMessage;
    this.checkData=function(_form){
    	 var form=eval(_form+"."+this.fieldName);
    	 if(isEmpty(form.value)){
    	 	   form.focus();
    	 	   this.errorMessage=_errorMessage+"欄位沒有填";
    	 	   throw new Error(this.errorMessage); 
    	 }else{
			if(this.format=="YYYYMMDD") {
				var pattern = new RegExp("^[0-9]{8,8}$", "g");
				if( !pattern.test(form.value) ) { 
					this.errorMessage  =_errorMessage+ "格式不正確(YYYYMMDD)"; 
					throw new Error(this.errorMessage);
				}
				var yearFormat =  form.value.substring(0,4);
				var monthFormat =  form.value.substring(4,6);
				var dayFormat =  form.value.substring(6,8);
			}
			if(this.format == "YYYY/MM/DD") {
				var pattern = new RegExp("^[0-9]{4,4}/[0-9]{1,2}/[0-9]{1,2}$", "g");
				if( !pattern.test(form.value) ) { 
					this.errorMessage = _errorMessage+"格式不正確(YYYY/MM/DD)"; 
					throw new Error(this.errorMessage);
				}
				formatArray = form.value.split("/");
				var yearFormat =  formatArray[0];
				var monthFormat =  formatArray[1];
				var dayFormat =  formatArray[2];
			}
			var dayArray = new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);
			yearFormat = parseInt(yearFormat,10);
			monthFormat = parseInt(monthFormat,10);
			dayFormat = parseInt(dayFormat,10);
			
			if(monthFormat==2 && (yearFormat % 4)==0 ) {
				dayArray[2] = 29;
			}
			if( dayFormat > dayArray[monthFormat]) {
				this.errorMessage = _errorMessage+ "格式不正確"; 
				throw new Error(this.errorMessage);
			}
		
    	}
    	return true;
    };		 

}
//比較日期大小
function CompareDateField(_sfieldName,_efieldName){
	return new CompareDateObject(_sfieldName,_efieldName);
}
function CompareDateObject(_sfieldName,_efieldName){
	this.sfieldName=_sfieldName;
	this.efieldName=_efieldName;
	this.errorMessage="開始日期不可大於結束日期";
	this.checkData=function(_form){
		 var sfield=eval(_form+"."+this.sfieldName);
		 var efield=eval(_form+"."+this.efieldName);
		 if(new Date(sfield.value)>new Date(efield.value)){
		 	throw new Error(this.errorMessage); 
		 }
		 return true;
	}
}
function OptionOne_TextField(_field1,_name1,_field2,_name2){
    this.field1=_field1;
    this.field2=_field2;
    this.errorMessage=_name1+"或"+_name2+"欄位至少要填一個";

    this.checkData=function(_form){
      
    	 var form1=eval(_form+"."+this.field1);
    	 var form2=eval(_form+"."+this.field2);
    	 if(isEmpty(form1.value)&& isEmpty(form2.value)){
    	 	   form1.focus();
    	 	   throw new Error(this.errorMessage); 
    	 }	 
    	 return true;
    }; 
}
//文字欄位			 
function TextField(_fieldName,_errorMessage){
    return new TextObject(_fieldName,_errorMessage);	
}			 
			 
function TextObject(_fieldName,_errorMessage){
    this.fieldName=_fieldName;
    this.errorMessage=_errorMessage+"欄位沒有填";
    this.checkData=function(_form){
    	 var form=eval(_form+"."+this.fieldName);
    	 if(isEmpty(form.value)){
    	 	   form.focus();
    	 	   throw new Error(this.errorMessage); 
    	 }	 
    	 return true;
    };		 
    		 
}			 
//CheckBox欄位
function CheckBoxField(_fieldName,_errorMessage){
  return new CheckBoxObject(_fieldName,_errorMessage);
}			 
function CheckBoxObject(_fieldName,_errorMessage){
    this.fieldName=_fieldName;
    this.errorMessage=_errorMessage+"欄位沒有填";
    this.checkData=function(_form){
    	 var form=eval(_form+"."+this.fieldName);

       for(i=0;i<form.length;i++){
    	 	if(form[i].checked){
    	 	   return true;
    	 	}
    	 }
    	 throw new Error(this.errorMessage); 
    };
}		 
//Radio欄位			 
function RadioField(_fieldName,_errorMessage){
    return new RadioObject(_fieldName,_errorMessage);
}			 
			 
function RadioObject(_fieldName,_errorMessage){
    this.fieldName=_fieldName;
    this.errorMessage=_errorMessage+"欄位沒有填";
    this.checkData=function(_form){
    	 var form=eval(_form+"."+this.fieldName);
    	 for(i=0;i<form.length;i++){
    	 	if(form[i].checked){
    	 	   return true;
    	 	}
    	 }
    	 throw new Error(this.errorMessage); 
    };		 
}