How to add javascript in blogspot (blogger) post

There is a problem. In new line. Every time you have new line blogger editor add <br /> tag. Because of this <br /> tag web browser can't execute jscript.

So correct solution for my problem should look like this:

<a onclick=javascript:showMessage() href="#" >Test</a>
<script language="JavaScript">function showMessage(){alert("Vaseem Ansari welcomes you, Thanks for Visiting my Blog");}</script>

To work well javascript in blogger post should be in one line.

This is example of JavaScript code that works (click on Test to see):
Test

If the script does not work click here

The JavaScript which makes this possible is

<script language="JavaScript">function showMessage(){alert("Vaseem Ansari welcomes you, Thanks for Visiting my Blog");}</script>

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