function opForm(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

//ランダムにバナー画像を表示する(壁紙)
imgIVY  = new Array();
imgIVY[0]  = "<img src='img/main01.jpg' width='250' height='250' />";
imgIVY[1]  = "<img src='img/main02.jpg' width='250' height='250' />";
imgIVY[2]  = "<img src='img/main03.jpg' width='250' height='250' />";
imgIVY[3]  = "<img src='img/main04.jpg' width='250' height='250' />";
imgIVY[4]  = "<img src='img/main05.jpg' width='250' height='250' />";
imgIVY[5]  = "<img src='img/main06.jpg' width='250' height='250' />";

i = Math.floor(Math.random()*imgIVY.length);

function img_top() {
	document.write(""+imgIVY[i]+"");
	}