JavaScript定时显示广告代码分享

function strToDate(str, ext) {
 if (str == null || str == '') return;
 var arys = new Array();
 arys = str.split('-');
 var newDate = new Date(arys[0], arys[1] - 1, arys[2], 9, 0, 0);
 if (ext) {
  newDate = new Date(newDate.getTime() + 1000 * 60 * 60 * 24);
 }
 return newDate;
}
function showit(str, start, end) {
 var date = new Date();
 var start = strToDate(start);
 var end = strToDate(end, false);
 if (date & gt; start & amp; & amp; date document.write(str);
}
}

showit('Your ads','2011-07-06','2011-07-18');