when an javascript error is occured , instead of showing the default error message by the system, we can show the our own cusom error message like this.

Restrict input to alphanumeric and uppercase

Remove control character from a string

Find and replace a string or character(s) inside another string

simple find and replace string

Find min and max of an array

This will convert the time from number of seconds to HH:MM format

This function will add all the elements in an array and return total(sum)

Get computed Height of an HTML Element

Get computed Width of an HTML Element