function baslikDegistir(deger){
document.getElementById("duyuru1").style.display = "none";
document.getElementById("duyuru2").style.display = "none";
document.getElementById("duyuru3").style.display = "none";
document.getElementById("duyuru4").style.display = "none";
document.getElementById("duyuru5").style.display = "none";
document.getElementById("kategori1").innerHTML = "<img src=images/main_25.jpg name=Image17 width=220 height=55 border=0 id=Image17 onmouseout=MM_swapImgRestore() onmouseover=MM_swapImage('Image17','','images/main-over_25.jpg',1) onclick=baslikDegistir(1); style=cursor:pointer; />";
document.getElementById("kategori2").innerHTML = "<img src=images/main_30.jpg name=Image18 width=220 height=48 border=0 id=Image18 onmouseout=MM_swapImgRestore() onmouseover=MM_swapImage('Image18','','images/main-over_30.jpg',1) onclick=baslikDegistir(2); style=cursor:pointer; />";
document.getElementById("kategori3").innerHTML = "<img src=images/main_31.jpg name=Image19 width=220 height=46 border=0 id=Image19 onmouseout=MM_swapImgRestore() onmouseover=MM_swapImage('Image19','','images/main-over_31.jpg',1) onclick=baslikDegistir(3); style=cursor:pointer; />";
document.getElementById("kategori5").innerHTML = "<img src=images/main_35.jpg name=Image21 width=220 height=49 border=0 id=Image21 onmouseout=MM_swapImgRestore() onmouseover=MM_swapImage('Image21','','images/main-over_35.jpg',1) onclick=baslikDegistir(5); style=cursor:pointer; />";
if(deger=="1"){
document.getElementById('baslik').innerHTML = "&#304;&ccedil;ecek Grubu Duyurular&#305; ";
document.getElementById("duyuru1").style.display = "";
document.getElementById("kategori1").innerHTML = "<img src=images/main-over_25.jpg name=Image17 width=220 height=55 border=0 id=Image17 onclick=baslikDegistir(1); style=cursor:pointer; />";
}
if(deger=="2"){
document.getElementById('baslik').innerHTML = "&#304;n&#351;aat Grubu Duyurular&#305; ";
document.getElementById("duyuru2").style.display = "";
document.getElementById("kategori2").innerHTML = "<img src=images/main-over_30.jpg name=Image18 width=220 height=48 border=0 id=Image18 onclick=baslikDegistir(2); style=cursor:pointer; />";
}
if(deger=="3"){
document.getElementById('baslik').innerHTML = "Akaryak&#305;t Grubu Duyurular&#305; ";
document.getElementById("duyuru3").style.display = "";
document.getElementById("kategori3").innerHTML = "<img src=images/main-over_31.jpg name=Image19 width=220 height=46 border=0 id=Image19 onclick=baslikDegistir(3); style=cursor:pointer; />";
}
if(deger=="4"){
document.getElementById('baslik').innerHTML = "Sigortac&#305;l&#305;k Grubu Duyurular&#305; ";
document.getElementById("duyuru4").style.display = "";
document.getElementById("kategori4").innerHTML = "<img src=images/main-over_32.jpg name=Image20 width=220 height=50 border=0 id=Image20 onclick=baslikDegistir(4); style=cursor:pointer; />";
}
if(deger=="5"){
document.getElementById('baslik').innerHTML = "Hayvanc&#305;l&#305;k Grubu Duyurular&#305; ";
document.getElementById("duyuru5").style.display = "";
document.getElementById("kategori5").innerHTML = "<img src=images/main-over_35.jpg name=Image21 width=220 height=49 border=0 id=Image21 onclick=baslikDegistir(5); style=cursor:pointer; />";
}

}