function FormChecker_isString(arg){
	var reg=/^(\ *)$/;
	return !reg.test(arg);
}

function FormChecker_lessThan( arg, len ){
	if( arg.length > parseInt(len) ){
		return false;
	}
	return true;
}

function FormChecker_isInt(arg,min,max){
	var reg=/^(\+|\-)?(0|([1-9]\d*))$/;
	if ( min==null && max==null){
		return reg.test(arg);
	}
	if ( min!=null && max!=null){
		return reg.test(arg) && arg >= min && arg<= max ;
	}
	if ( min!=null && max==null){
		return reg.test(arg) && arg >= min ;
	}
	if ( min==null && max!=null){
		return reg.test(arg) && arg<= max ;
	}
}

function FormChecker_isPInt(arg,min,max){
	var reg=/^\+?[1-9]\d*$/;
	if ( min==null && max==null){
		return reg.test(arg);
	}
	if ( min!=null && max!=null){
		return reg.test(arg) && arg >= min && arg<= max ;
	}
	if ( min!=null && max==null){
		return reg.test(arg) && arg >= min ;
	}
	if ( min==null && max!=null){
		return reg.test(arg) && arg<= max ;
	}
}

function FormChecker_isPercent(arg){
	var reg=/^(([1-9]\d?)|100|0)$/;
	return reg.test(arg);
}

function FormChecker_isFloat(arg, min, max){
	var reg=/^(\+|\-)?(\d+|\b)?(\.\d+)?((\e|\E)?(\+|\-)?\d+)?$/;
	if ( min==null && max==null){
		return reg.test(arg);
	}
	if ( min!=null && max!=null){
		return reg.test(arg) && arg >= min && arg<= max ;
	}
	if ( min!=null && max==null){
		return reg.test(arg) && arg >= min ;
	}
	if ( min==null && max!=null){
		return reg.test(arg) && arg<= max ;
	}
}

function FormChecker_isPFloat(arg,min,max){
	var reg=/^\+?(\d+|\b)?(\.\d+)?((\e|\E)?(\+|\-)?\d+)?$/;
	if ( min==null && max==null){
		return reg.test(arg);
	}
	if ( min!=null && max!=null){
		return reg.test(arg) && arg >= min && arg<= max ;
	}
	if ( min!=null && max==null){
		return reg.test(arg) && arg >= min ;
	}
	if ( min==null && max!=null){
		return reg.test(arg) && arg<= max ;
	}
}

function FormChecker_isEMail(arg){
	var reg=/^(\w|\.|-)+\@(\w|\.|-)+\.+(\w)+$/i;
	return reg.test(arg);
}

function FormChecker_isURL(arg){
	var reg=/^[a-z]+\:\/\/(\w|\w(\w|\.|\-)*\w)(\:\d{1,5})?((\/|\?).*)?$/i;
	return reg.test(arg);
}

function FormChecker_isID(arg){
	var reg=/^([a-z]|\_)\w*$/i;
	return reg.test(arg);
}

function FormChecker_isDate(arg){
	var reg=/^\d{4}\/(1[012]|0?[1-9]){2}\/([12]\d|3[01]|0?[1-9]){2}$/;
	if(reg.test(arg)){
		var nreg=/[1-9]\d*/;
		var numbers=arg.split("\/");
		var year=parseInt(numbers[0].substring(numbers[0].search(nreg),numbers[0].length));
		var month=parseInt(numbers[1].substring(numbers[1].search(nreg),numbers[1].length));
		var day=parseInt(numbers[2].substring(numbers[2].search(nreg),numbers[2].length));
		var thisDay=new Date(year,month-1,day);
		//alert(year+" "+month+" "+day+"\n"+thisDay.getFullYear()+" "+(thisDay.getMonth()+1)+" "+thisDay.getDate());

		return (year==thisDay.getFullYear()&&month==(thisDay.getMonth()+1)&&day==thisDay.getDate());
	}
	else{
		return false;
	}
}

function FormChecker_isHrisDate(arg){
	var reg=/^\d{4}\/(1[012]|0?[1-9]){2}\/([12]\d|3[01]|0?[1-9]){2}$/;
	if(reg.test(arg)){
		var nreg=/[1-9]\d*/;
		var numbers=arg.split("\/");
		var year=parseInt(numbers[0].substring(numbers[0].search(nreg),numbers[0].length));
		var month=parseInt(numbers[1].substring(numbers[1].search(nreg),numbers[1].length));
		var day=parseInt(numbers[2].substring(numbers[2].search(nreg),numbers[2].length));
		var thisDay=new Date(year,month-1,day);
		//alert(year+" "+month+" "+day+"\n"+thisDay.getFullYear()+" "+(thisDay.getMonth()+1)+" "+thisDay.getDate());

		return (year==thisDay.getFullYear()&&month==(thisDay.getMonth()+1)&&day==thisDay.getDate());
	}
	else{
		return false;
	}
}

function FormChecker_isTime(arg){
	var reg=/^([01]?\d|2[0-3]|)\:[0-5]?\d:[0-5]?\d$/;
	return reg.test(arg);
}

function FormChecker_addType(typeName,typeFunc,errorMes){
	this.testType[typeName]=typeFunc;
	var errorMessage=errorMes;
	if(errorMes==null)
		errorMessage="should be a valid "+typeName.toUpperCase();
	this.typeError[typeName]=errorMessage;
}

function FormChecker_addField(fieldName,typeName,errorMes){
	this.fieldType[fieldName]=typeName;
	var errorMessage=errorMes;
	if(errorMes==null)
		errorMessage=fieldName.toUpperCase()+" "+this.typeError[typeName]+"!";
	this.fieldError[fieldName]=errorMessage;
}

function FormChecker_checkAll(){
	var ret=true;
	var mes="";
	for(fieldName in this.fieldType){
		var typeName=this.fieldType[fieldName];
		var func=this.testType[typeName];
		var testValue=eval("document."+this.formName+"."+fieldName).value;
		if(testValue==null||testValue==""){
			ret=false;
			mes+="\n"+fieldName.toUpperCase()+" can't be blank!";
		}
		else{
			if(!func(testValue)){
				ret=false;
				mes+="\n"+this.fieldError[fieldName];
			}
		}
	}
	if(!ret)
		alert(mes);
	return ret;
}

function FormChecker_checkField(fld,typeName,min,max,errorMes){
	var errorMessage=errorMes;
	if(errorMes==null || errorMes==""){
		errorMessage="This Field "+this.typeError[typeName];
	}
	var func=this.testType[typeName];
	if(func(fld.value,min,max)){
		return true;
	}
	else{
		alert(errorMessage);
		return false;
	}
}

function FormChecker_checkFieldLessThan(fld,grid,errorMes){
	var errorMessage=errorMes;
	if(errorMes==null){
		errorMessage="This Field shouldn't be longer than "+grid;
	}
	if( fld.value.length > parseInt(grid) ){
		alert(errorMessage);
		fld.value='';
		return false;
	}
	return true;
}

function FormChecker(formName){
	this.testType=new Array();
	this.typeError=new Array();
	this.fieldType=new Array();
	this.fieldError=new Array();

	this.isString=FormChecker_isString;
	this.testType["string"]=this.isString;
	this.typeError["string"]="can't be made up by only blankspace";
	
	this.lessThan=FormChecker_lessThan;
	this.testType["lessThan"]=this.lessThan;
	this.typeError["lessThan"]="string to long";

	this.isInt=FormChecker_isInt;
	this.testType["int"]=this.isInt;
	this.typeError["int"]="should be a valid Integer";

	this.isPercent=FormChecker_isPercent;
	this.testType["percent"]=this.isPercent;
	this.typeError["percent"]="should be a valid Integer between 0 and 100";

	this.isFloat=FormChecker_isFloat;
	this.testType["float"]=this.isFloat;
	this.typeError["float"]="should be a valid Float";

	this.isPInt=FormChecker_isPInt;
	this.testType["pInt"]=this.isPInt;
	this.typeError["pInt"]="should be a valid Integer greater than 0";

	this.isPFloat=FormChecker_isPFloat;
	this.testType["pFloat"]=this.isPFloat;
	this.typeError["pFloat"]="should be a valid Float greater than 0";

	this.isEMail=FormChecker_isEMail;
	this.testType["email"]=this.isEMail;
	this.typeError["email"]="should be a valid EMail expression like john.smith_us@hotmail.com";

	this.isURL=FormChecker_isURL;
	this.testType["url"]=this.isURL;
	this.typeError["url"]="should be a URL with protocol like http://www.google.com/search?p=wahaha";

	this.isID=FormChecker_isID;
	this.testType["id"]=this.isID;
	this.typeError["id"]="can just contains 'a'-'z','_','0'-'9', and it can't be started with '0'-'9'";

	this.isDate=FormChecker_isDate;
	this.testType["date"]=this.isDate;
	this.typeError["date"]="should be a YYYY/MM/DD valid date expression";
	
	this.isHrisDate=FormChecker_isHrisDate;
	this.testType["hrisdate"]=this.isHrisDate;
	this.typeError["hrisdate"]="should be a DD/MM/YYYY valid date expression";	

	this.isTime=FormChecker_isTime;
	this.testType["time"]=this.isTime;
	this.typeError["time"]="should be an HH:MM:SS valid time expression";
	
	this.addType=FormChecker_addType;
	this.addField=FormChecker_addField;
	this.checkAll=FormChecker_checkAll;
	this.checkField=FormChecker_checkField;
	this.checkFieldLessThan=FormChecker_checkFieldLessThan;
	
	this.formName=formName;
}
function alertDel(){
   return confirm("Do you sure DELETE?");

  }