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Lightweight javascript datepicker

Lightweight javascript datepicker

This script is a modern browser automatic date picker solution. No third-party library dependency, IE support is IE8+.

See live demo.

How to use

Simple usage

First, you need to put a table element inside your page which the library can use to generate the calendar.

<table 
	id="datepicker" 
	class="dp_calendar" 
	cellpadding="0" 
	cellspacing="0"
></table>

For a given id attribute of 'birthday', you should have

  • an input text with id equal to 'birthday'
  • an onclick event on it to open datepicker
<input 
	type="text" 
	name="date_button" 
	id="date_button" 
	value="2011-06-02" 
	onclick="DP.open('date_button')"
>

Positionning

You can specify a second parameter to specify the datepicker position. If empty, datepicker use the first parameter (aka element ID value) to get its position. It can be an element ID value, a DOM element or a X,Y array.

<input 
	type="text" 
	name="date_button" 
	id="date_button" 
	value="2011-06-02" 
	onclick="DP.open('date_button','date_button')"
>

<input 
	type="text" 
	name="date_button" 
	id="date_button" 
	value="2011-06-02" 
	onclick="DP.open('date_button', myDomElement)"
>

<input
	type="text"
	name="date_button"
	id="date_button"
	value="2011-06-02"
	onclick="DP.open('date_button', [10,40])"
>

On multiple selects

For a given id attribute of 'birthday', you should have

  • 3 selects with ids 'birthday_day', 'birthday_month' & 'birthday_year'.
  • an hidden input text with id equal to 'birthday'
<select
	name="date_select1_day"
	id="date_select1_day"
	size="1"
	onblur="DP.update('date_select1')"
>
	...
</select>
			
<select
	name="date_select1_month"
	id="date_select1_month"
	size="1"
	onblur="DP.update('date_select1')"
>
	...
</select>

<select
	name="date_select1_year"
	id="date_select1_year"
	size="1"
	onblur="DP.update('date_select1')"
>
</select>

<input
	type="hidden"
	name="date_select1"
	id="date_select1"
	value="2011-06-02"
>
<a
	href="javascript:DP.open('date_select1','date_select1_dp')"
	id="date_select1_dp"
><img src="datepicker_cal.gif"></a>

Please note that in this case, it might be a good idea to add onblur events on select to update the hidden input value when a select value changes.

Onchange event callback

DatePicker can also trigger a function on

<input
	readonly
	type="hidden"
	name="date_callback"
	id="date_callback"
	value="2011-06-02"
	onchange="myFunction(this.value,'date_callback_text')"
>
<input
	readonly
	type="text"
	id="date_callback_text"
	value="June 2th, 2011"
	onclick="DP.open('date_callback','date_callback_text')"
>

<script>
function myFunction(val, tid) {
	DP.gbi(tid).value = DP.toString(val);
}
</script>

API

####DP._locale An object contains a "months" array, and a "days" array. months[] goes from 0 to 11 as 'January' to 'December', and days[] goes from 0 to 6 as 'Sun' to 'Sat'.

####DP.gbi(eid) Just a shortcut to document.getElementById.

####DP.formatDate(d,m,y) A function to return a well formated yyyy-mm-dd string from strings or integers. ex: DP.formatDate(2,6,1982) ---> "1982-06-02"

####DP.toString(d) Returns a human friendly date from a well formated yyyy-mm-dd string. ex: DP.toString('1982-06-02') ---> "June 2th, 1982"

Want to contribute?

Any contribution is always welcome. As an example, Responsive CSS and multilingual support would be pretty nice contributions :)

Special thanks

Thanks to DtTvB's work, DatePicker really start as a cleanup of it.

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