CODE – Javascript Function add option to a select box

How to add the single select option to the selection list with the id specified

CODE – Javascript Function add an event listener to an object

CODE – Javascript Function add an on load event

CODE – Javascript Function gets aelement by class

CODE – Javascript Function hide then show an object

CODE – Javascript Function isDate

Simple code: JavaScript validation for a date field. Uses the American format of mm/dd/yyyy or dd/mm/yyyy.
You can modify the variable re to support other standards with simple reg expression.

CODE – Function Javascript left

Simple Javascript: function Left(string,number)

CODE – Javascript Function find the position of any element or object within the DOM

CODE – Javascript Function remove option in a select box

Remove the option with the specified value from the list of options in the selection list with the id specified.