handwritten means,they will ask a graphologist as well to judge you.....

This may give you some tips

http://www.success-and-career.ch/EN/index.php

Generally one page should be sufficient,in which you state what Fred already has posted in his reply.

If you elaborate too much,the HR person might get bored and put your application aside before even finish reading it.The Beobachter, a swiss consumers instituition (alike your Watchdog or X-Ray in England) has stated in an article in it's magazine that the first 10 seconds of reading an application are the most important.............

I took the liberty of sarching their archive for the article and have translated it for you,please excuse my many mistakes,after all english is not my mother tongue,but i am sure you 'll get an idea what's (roughly) wanted by swiss employers

Good luck with job hunting!
EE
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The accompanying letter is nearly just as important to an application as is the CV.
You’ll be more successful if you take good heed of some basic rules. Writers of long messages rob time from the reader and are considered as little efficient.
The main rule therefore: For the accompanying letter to an application for a job, one page must be enough.

Formulated briefly, but spirited contents are better accepted.

In the personal record you’ve placed everything what is important about your professional training, other activities and objectives. A repetition of all this in the individually drawn up accompanying letter would only bore the possible new employer.
“Primarily the motivation should be stated, why one is interested in a place” ,says Prisca BRUCH, chief of Human Resources of the Espace Media Group.
Only to write, “I apply for the job, because I am interested in it
”, is however too poorly.

“Rather than that, one should try, to interest the possible future employer into the increase of value one can offer to the business as new coworkers.”

That shows also that one made his/her homework about the job on offer and has thought the application through before putting it to paper. With many jobs one might have some difficulty to formulate such an increase in value.

Then the tip from Monica Verin, Personal consultant with Swiss Television comes in handy:
“With the draft of the accompanying letter up, one should ask oneself: What do they expect from me? Why am I the correct person for it?”
The own wants and needs should be put to the back for a moment. “Letters with lots of ‹I want› - messages, do not address an employer.”
To structure such a letter usually three sections are sufficient for it:

As an (1) Introduction you explain why you apply for a place and add if possible, why you think the company is interesting to you or in general. Excessive exaggerations and compliments do not help, it should sound honest.
In the 2nd section you describe, your personal motivation why you want to work for THAT enterprise and why you’re convinced, to be the right candidate for that job.

Towards the end (3) the complimentary closing phrase should contain a reference to the fact that you would be pleased about a reaction from them or that you would like to elaborate on your application in a personal interview.
It is wrong, if you place or put in conditions whatsoever. Because under NO circumstances should the impression develop that you’re despairing and absolutely want or need that job that would be counter-productive.