js定时显示广告代码

这是一则定时显示广告的javascript代码，当然也可以定时显示某一区块内容，很实用。

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);
}
}

调取：

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

<script type="text/javascript">
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);
}
console.log(newDate);
return newDate;
}
start = "2012-02-24";
end = "2013-02-27";
var date = new Date();
var start = strToDate(start);
var end = strToDate(end, false);
//document.write start.toString(); 
str = "广告1";
str2 = "广告2";
if(date > start && date < end) {
document.write(str);
} else {
document.write(str2);
}
</script>