A bookmarklet to check a range of checkboxes

README.md

A bookmarklet to check a range of checkboxes

Ever wanted to be able to check a range of checkboxes? Like you do select a number of files in a file browser? May be to check some mails in your web based eMail client? Then this bookmarklet is for you.

Should work in all modern browsers.

I wrote this to help my lovely girlfriend manage her gmx.net inbox. Afterwards I found out, Google Mail does already sport this feature. Of course. So I guess this is only of interest for people using a gmx.net or web.de account.

How to get it?

Since GitHub doesn't allow forms or scripts in markdown files, you'll have to fetch it from here:

http://checkrange.markusfisch.de/

CheckRange.js

(function( w )
{
	if( w.checkRange )
		return;

	w.checkRange =
	{
		last: null,
		status: false,

		init: function()
		{
			var i = document.getElementsByTagName( "input" );

			for( var n = 0; n < i.length; ++n )
				if( i[n].type === "checkbox" )
				{
					i[n].checkRangeNextOnClick = i[n].onclick;
					i[n].onclick = function( ev )
					{
						if( ev.shiftKey &&
							w.checkRange.last )
							w.checkRange.check(
								w.checkRange.last,
								this );

						w.checkRange.last = this;
						w.checkRange.status = this.checked;

						return this.checkRangeNextOnClick ?
							this.checkRangeNextOnClick() :
							true;
					};
				}
		},

		check: function( from, to )
		{
			var i = document.getElementsByTagName( "input" );
			var found = false;

			for( var n = 0; n < i.length; ++n )
			{
				if( i[n] === from ||
					i[n] === to )
				{
					if( found )
						break;

					found = true;
				}

				if( !found )
					continue;

				i[n].checked = w.checkRange.status;

				if( from === to )
					break;
			}
		}
	};

	w.checkRange.init();
}( window ))