function open3(){ window.open("http://www.sonicjapan.co.jp/low/on_low.html","Windowopen3","SCROLLBARS=yes,toolbar=no,location=no,directories=no,status=yes,menubar=yes,resizable=yes,width=580,height=500") 
}

function open03(){ window.open("http://www.sonicjapan.co.jp/low/protect.html","Windowopen3","SCROLLBARS=yes,toolbar=yes,location=no,directories=no,status=yes,menubar=yes,resizable=yes,width=580,height=500") 
}

function open4(){ window.open("http://www.sonicjapan.co.jp/low/on_low.html","Windowopen3","SCROLLBARS=yes,toolbar=yes,location=no,directories=no,status=yes,menubar=yes,resizable=yes,width=580,height=500") 
}

function open04(){ window.open("http://www.sonicjapan.co.jp/low/protect.html","Windowopen3","toolbar=no,location=no,directories=no,status=yes,menubar=yes,resizable=yes,width=480,height=450") 
}

function PageBack(){
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