BlogPreload

function BlogPreload() {
    var creating = true;
    var params = location.href.split('?').slice(1).join('?').split('&');
    for(var i = 0; i < params.length; i++) {
        if(params[i].split('=')[0] == 'pageId') {
            creating = false;
            break;
        }
    }
    if(creating && wgPageName == 'Special:CreateBlogPage') {
        if(document.getElementById('cke_contents_wpTextbox1') != null) {
            document.getElementById('cke_contents_wpTextbox1').getElementsByTagName('iframe')[0].contentDocument.getElementById('bodyContent').innerHTML = '<p data-rte-fromparser="true"><img data-rte-meta="%7B%22type%22%3A%22double-brackets%22%2C%22lineStart%22%3A%22%22%2C%22title%22%3A%22Template%3ABlogheader%22%2C%22placeholder%22%3A1%2C%22wikitext%22%3A%22%7B%7BTemplate%3ABlogheader%7D%7D%22%7D" class="placeholder placeholder-double-brackets" data-cke-saved-src="http://images1.wikia.nocookie.net/__cb35490/common/skins/common/blank.gif" src="http://images1.wikia.nocookie.net/__cb35490/common/skins/common/blank.gif" type="double-brackets"></p><p data-rte-fromparser="true" data-rte-empty-lines-before="1"><img data-rte-meta="%7B%22type%22%3A%22comment%22%2C%22wikitext%22%3A%22%3C%21--%20Please%20put%20your%20content%20under%20this%20line.%20--%3E%22%2C%22placeholder%22%3A1%7D" data-rte-instance="177-1852961854d9ce6078620f" class="placeholder placeholder-comment" data-cke-saved-src="http://images1.wikia.nocookie.net/__cb35490/common/skins/common/blank.gif" src="http://images1.wikia.nocookie.net/__cb35490/common/skins/common/blank.gif" type="comment"></p>';
        }
        else {
            document.getElementById('wpTextbox1').innerHTML = '{{Blogheader}}\n\n<!-- Please place your content under this line. -->';
        }
    }
}

addOnloadHook(BlogPreload);