title: Restricting a text box to enter only numeric values and not alphabetical & alphanumeric values
body: <p>I have 2 text boxes viz. txt_Long and txt_Lat. I want that only numeric values be able to be inserted into those text boxes and not numeric or alphanumeric values. If tried to insert any other values except numeric value, a validation violation message should be displayed in red color just under the respective text boxes.Can any one please help ?</p>