php pass 2 date value to javascript

function dateDiff() {</p> <p> var date1 = new Date(document.getElementById(“fromDatePicker”).value);<br /> var date2 = new Date(document.getElementById(“toDatePicker”).value);<br /> var difference = date2 – date1;<br /> var days = difference/(24*3600*1000);<br /> document.getElementById(‘hari’).value=days;<br /> }