function entriesOn(){
document.getElementById('entriesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead-on.gif)';
document.getElementById('entriesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot-on.gif)';
}

function entriesMousedown(){
document.getElementById('entriesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead-active.gif)';
document.getElementById('entriesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot-active.gif)';
}

function entriesMouseup(){
document.getElementById('entriesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead-on.gif)';
document.getElementById('entriesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot-on.gif)';
}

function entriesMouseout(){
document.getElementById('entriesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead.gif)';
document.getElementById('entriesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot.gif)';
}




function archivesOn(){
document.getElementById('archivesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead-on.gif)';
document.getElementById('archivesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot-on.gif)';
}

function archivesMousedown(){
document.getElementById('archivesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead-active.gif)';
document.getElementById('archivesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot-active.gif)';
}

function archivesMouseup(){
document.getElementById('archivesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead-on.gif)';
document.getElementById('archivesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot-on.gif)';
}

function archivesMouseout(){
document.getElementById('archivesTitleHead').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlehead.gif)';
document.getElementById('archivesTitleFoot').style.backgroundImage = 'url(http://engineer.dena.jp/img/common/subtitlefoot.gif)';
}