// ヘッダ下イメージ画像ランダム表示


onLoad="MM_preloadImages('images/main01.gif','images/main02.gif','images/main03.gif','images/main04.gif','images/main05.gif')"

var iValue, rNumber;
var img1 = new Image();
var img2 = new Image();
var img3 = new Image();
var img4 = new Image();
var img5 = new Image();
img1 = "images/main01.gif";
img2 = "images/main02.gif";
img3 = "images/main03.gif";
img4 = "images/main04.gif";
img5 = "images/main05.gif";


function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}


function display_image(){
	iValue = Math.random() * 5;
	rNumber = Math.ceil(iValue);
	if(rNumber==0) rNumber++;
	document.image1.src=eval("img" + rNumber);
}