function isBlank(n)
{
	if ( n == "" )
		return true;
	else
	{
		var i=1;
		var nLength = n.length;
		var blnSpaceCheck;

/*		while (n.length != 0)
		{
			if(substr(n,(n.length-1),1)==" ")
				n = substr(n,0,n.length-2)
			else
				break;
		}*/

		while ( parseInt(i) < parseInt(nLength) )
		{
			if ( n.charAt(parseInt(i))  == " " || parseInt(i)==parseInt(nLength)  )
				blnSpaceCheck= true;
			else
				blnSpaceCheck = false;
			i++;
		}
		return blnSpaceCheck;
	}
}