document.forms.dates.addEventListener('click', elem => {
if(elem.tagName == 'SPAN') { elem.firstElementChild.showPicker(); }
});
document.forms.dates.start.addEventListener('change', elem => {
var dateValue = elem.valueAsDate;
dateValue.setDate( dataValue.getDate() + 6 );
document.forms.dates.end.value = dateValue.getFullYear() + '-' + ('0'+(dateValue.getMonth()+1)).slice(-2) + '-' + ('0'+(dateValue.getDate())).slice(-2);
});
document.forms.dates.addEventListener('click', elem => {
if(elem.tagName == 'SPAN') { elem.firstElementChild.showPicker(); }
});
document.forms.dates.start.addEventListener('change', elem => {
var dateValue = elem.valueAsDate;
dateValue.setDate( dataValue.getDate() + 6 );
document.forms.dates.end.value = dateValue.getFullYear() + '-' + ('0'+(dateValue.getMonth()+1)).slice(-2) + '-' + ('0'+(dateValue.getDate())).slice(-2);
});