function AlphaNumeric(strVariable)
{
	var showAlert = false;

	for (i = 0; i <= strVariable.length-1; i++) 
	{
		if (strVariable.substr(i,1).search(/[A-Za-z0-9_]/) < 0 ) 
		{
			showAlert = true ;
			break ;
		}
	}

	//True : Variable contain ASCII values.
	//False: Variable does not contain any ASCII values.

	return showAlert;
}