how to change header in blogger

U can create script like that :

<script type="text/javascript">
var container = document.getElementById("header-inner");
container.innerHTML ="http://sourcefield.blogspot.com";
</script>

more...

blog plugin to firefox

just found nice plugin to firefox , that allow post to blogger.com.
can be installed from
here.

add google search to website

To add google search box please copy code below. (replace sourcefield.blogspot.com with your address)
Also you can get free virus protection from google within google pack.

<input class="BlogSearch" type="text" name="searchBox" id="blogSearchText" value="" onkeypress="return blogSearch(event, this);">
<input type="button" value="Search" onclick="return blogSearch2('blogSearchText');" class="BlogSearchButton">
<script type="text/javascript">

function blogSearch(event, oInput) {
 var keyCode = (event) ? event.keyCode : keyStroke.which;
 if (keyCode == 13) {
    top.location = 'http://www.google.com/search?q=' + escape(oInput.value) + '+site%3Asourcefield.blogspot.com';
    return false;
 } return true;
}

function blogSearch2(oInputId) {
 var oInput = document.getElementById(oInputId);
 top.location = 'http://www.google.com/search?q=' + escape(oInput.value) + '+site%3Asourcefield.blogspot.com';
 return false;
}
</script>