var m=(new Date()).getMonth()+1;
var tuki=new Array;
tuki[1]="<script type='text/javascript' src='js/winter.js'></script>";//1月
tuki[2]="<script type='text/javascript' src='js/winter.js'></script>";//2月
tuki[3]="<script type='text/javascript' src='js/spring.js'></script>";//3月
tuki[4]="<script type='text/javascript' src='js/spring.js'></script>";//4月
tuki[5]="<script type='text/javascript' src='js/spring.js'></script>";//5月
tuki[6]="<script type='text/javascript' src='js/summer.js'></script>";//6月
tuki[7]="<script type='text/javascript' src='js/summer.js'></script>";//7月
tuki[8]="<script type='text/javascript' src='js/summer.js'></script>";//8月
tuki[9]="<script type='text/javascript' src='js/autumn.js'></script>";//9月
tuki[10]="<script type='text/javascript' src='js/autumn.js'></script>";//10月
tuki[11]="<script type='text/javascript' src='js/autumn.js'></script>";//11月
tuki[12]="<script type='text/javascript' src='js/winter.js'></script>";//12月
document.write(tuki[m]);