window.onload = function(){

//メインバナー制御

document.getElementById("footer1").onmouseover = function(){
this.src = "../../images/home1_2.gif";
}
document.getElementById("footer1").onmouseout = function(){
this.src = "../../images/home1_1.gif";
}

document.getElementById("footer2").onmouseover = function(){
this.src = "../../images/sitemap1_2.gif";
}
document.getElementById("footer2").onmouseout = function(){
this.src = "../../images/sitemap1_1.gif";
}

document.getElementById("footer3").onmouseover = function(){
this.src = "../../images/mail1_2.gif";
}
document.getElementById("footer3").onmouseout = function(){
this.src = "../../images/mail1_1.gif";
}

}