function trimchar(pastr){

	var lenstr = pastr.length;

	for(var i = 0 ; pastr.charAt(i) == " "; i++);

	for(var j = pastr.length - 1; pastr.charAt(j)== " "; j--);

	j++;

	if (i > j)

		pastr = "";

	else

		pastr = pastr.substring(i,j);

	return pastr;

}



//For checking Null values



function isNull(aStr)

{

	var index;		

	for (index=0; index < aStr.length; index++)

		if (aStr.charAt(index) != ' ')

			return false;

	return true;

}

	

	//For checking invalid E-Mail address

var reEmail=/^[0-9a-zA-Z_\.-]+\@[0-9a-zA-Z_\.-]+\.[0-9a-zA-Z_\.-]+$/



function checkEmail(obj){

 	if(!reEmail.test(obj))

	{

		return false;

	}

	return true;

}

	// For checking and allowing only certain numeric values for Quantity

	function isNumeric(val,allow_dec,allow_neg)

	{

		var str = "";

		if(allow_neg)         //value can be negative

		{

			str += "^-";

		}		

		if(allow_dec)         //value can be decimal 

		{

			str += "[0-9]{1,}\.{0,1}"; 

		}	

		str += "^[0-9]{1,}$";				

		var reg = new RegExp(str);

		return reg.test(val);

	}

	

function isAlphaNumeric(varData)

{

	varRegExp = new RegExp("^[A-Za-z0-9_]+$");

	if(!varRegExp.test(varData))

	{

		return true

	}	

	return false

}

function IsValidImageName(strVal)

{

	nNoOfArguments = IsValidImageName.arguments.length;



	//if parameter is not supplied

	if(nNoOfArguments < 1)

	{

		return false;

	}

		

	//valid characters a supplied string value can have

	var sValidChars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-";

	

	strVal = new String(strVal);	//convert the value to a string object

	

	var bReturn = true	

	var i = new Number(0);

	while ((bReturn) && (i < strVal.length))

	{

		bReturn = (sValidChars.indexOf(strVal.charAt(i)) >= 0)

		i++

	}

	return (bReturn);	

}



/* 

	Date Should be in MM/DD/YY

	date 1 > date 2 return 1

	date 1 < date 2 return -1

	date 1 = date 2 return 0



*/



function compareDates(dt1,dt2)

{

	var datepart1 = dt1.split("/");

	var datepart2 = dt2.split("/");

	

	for(i=0;i<datepart1.length;i++)

	{

		datepart1[i] = parseInt(parseFloat(datepart1[i]));

		datepart2[i] = parseInt(parseFloat(datepart2[i]));		

	}	

	

	if(datepart1[2] > datepart2[2])

		return 1;

	else if(datepart1[2] < datepart2[2])	 

		return -1;

	else if(datepart2[2] == datepart1[2])	 	

	{

		if(datepart1[0] > datepart2[0])

			return 1;

		else if(datepart1[0] < datepart2[0])	

			return -1;

		else if(datepart1[0] == datepart2[0])					 

		{

			if(datepart1[1] > datepart2[1])

				return 1;

			else if(datepart1[1] < datepart2[1])	

				return -1;			

		}

	}

		return 0;	

}