/**********************************************************************/ 
/*Function name :isDigit(theDigit) */ 
/*Usage of this function :test for an digit */ 
/*Input parameter required:thedata=string for test whether is digit */ 
/*Return value :if is digit,return true */ 
/* else return false */ 
/**********************************************************************/ 
function isDigit(theDigit) 
{ 
	var digitArray = new Array('0','1','2','3','4','5','6','7','8','9'),j; 

	for (j = 0; j < digitArray.length; j++) 
	{if (theDigit == digitArray[j]) 
	return true 
	} 
	return false
} 

/*************************************************************************/ 
/*Function name :isPositiveInteger(theString) */ 
/*Usage of this function :test for an +ve integer */ 
/*Input parameter required:thedata=string for test whether is +ve integer*/ 
/*Return value :if is +ve integer,return true */ 
/* else return false */ 
/*function require :isDigit */ 
/*************************************************************************/ 
function isPositiveInteger(theString) 
{ 
	var theData = new String(theString) 

	if (!isDigit(theData.charAt(0))) 
	if (!(theData.charAt(0)== '+')) 
	return false 

	for (var i = 1; i < theData.length; i++) 
	if (!isDigit(theData.charAt(i))) 
	return false 
	return true
} 

/**********************************************************************/ 
/*Function name :isDate(s,f) */ 
/*Usage of this function :To check s is a valid format */ 
/*Input parameter required:s=input string */ 
/* f=input string format */ 
/* =1,in mm/dd/yyyy format */ 
/* else in dd/mm/yyyy */ 
/*Return value :if is a valid date return 1 */ 
/* else return 0 */ 
/*Function required :isPositiveInteger() */ 
/**********************************************************************/ 
function isDate(s,f) 
{
	if (s.length!=0)
	{	 
		var a1=s.split("/"); 
		var a2=s.split("-"); 
		var e=true; 
		if ((a1.length!=3) && (a2.length!=3)) 
		{ 
			e=false; 
		} 
		else 
		{
			if (a1.length==3) 
				var na=a1; 
			if (a2.length==3) 
				var na=a2; 
			if (isPositiveInteger(na[0]) && isPositiveInteger(na[1]) && isPositiveInteger(na[2])) 
			{ 
				if (f==1) 
				{
					var d=na[1],m=na[0]; 
				} 
				else 
				{
					var d=na[0],m=na[1]; 
				} 
				var y=na[2]; 
				if (((e) && (y<1000)||y.length>4)) 
					e=false 
					if (e) 
					{ 
						v=new Date(m+"/"+d+"/"+y); 
						if (v.getMonth()!=m-1) 
							e=false; 
					} 
			} 
			else 
			{ 
				e=false; 
			} 
		} 
		return e 
	}
	else
		return true;
}