IE6だとgetElementsByClassName
が使えないため、
document.getElementsByTagName("span");
を使った。
<span class="view_timer" start="20170503" end="20170504">20170503〜20170504の間表示</span>
<span class="view_timer" start="20170504" end="">20170504以降ずっと表示</span>
<span class="view_timer" start="" end="20170509">20170509まで表示</span>
<script>
function get_yyyymmdd() {
var d=new Date();
var year = d.getFullYear();
var month = d.getMonth()+1;
var day = d.getDate();
if(month<10) {
month = "0"+month;
}
if(day<10) {
day = "0"+day;
}
var yyyymmdd = year + month + day;
return yyyymmdd;
}
function view_timer() {
var elements = document.getElementsByTagName("span");
for (i=0; i < elements.length; i++) {
if (elements[i].className != "view_timer") {
continue;
}
var start = elements[i].getAttribute('start');
var end = elements[i].getAttribute('end');
if((get_yyyymmdd() < start) || (end != "" && end < get_yyyymmdd())) {
elements[i].style.display = 'none';
}
}
}
view_timer();
</script>