if(navigator.userAgent.indexOf("Mac")!=-1){ 
document.write("<LINK REL=STYLESHEET HREF=http://www.tabinet-jp.com/erea/ereaguide_m.css TYPE=text/css>"); 
} else { 
document.write("<LINK REL=STYLESHEET HREF=http://www.tabinet-jp.com/erea/ereaguide.css TYPE=text/css>"); 
} 

function jump(sel) {

  if (sel.options[sel.selectedIndex].value) {

    location.href = sel.options[sel.selectedIndex].value;

  }

}

function openNewWindow(fileName,windowName,theWidth,theHeight) {

	window.open(fileName,windowName,"toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width="+theWidth+",height="+theHeight)

}