You can Host Javascript Or .js files on Blogger Itself

The best solution to host your javascript on blogger itself

For External Javascript the code is

<script src='http://Your-Script-Url/file.js' type='text/javascript'/>

Whenever you are trying to implement some hack making use of javascript you would have mostly been asked to download the .js file and upload to your own server,get its url and then replace it with red link in above codes shown above,and then place the whole above codes in blogger html before closing of head tag.
So why don’t we upload these JavaScripts to blogger itself.Just what you have to do is,whenever you are asked to do this kind of above stuff while implementing any hack.
Just use below code in place of above one.

<script type='text/javascript'>
//<![CDATA[

<--Paste all code here from .js file -->

//]]>
</script>

Just in place of “<–Paste all code here from .js file –>” line in above code what you have to do is just open the .js file (which you are asked to download or upload to your own server) in notepad or on your browser , copy its code and paste it in place of above red line.And your javascript codes are now ready which are now hosted on blogger itself instead of hosting to third party server.