var reg = /(?![])(\w|[一-龥]|\:|\/|\s)*(?=(<\/td>))/gim;
str.match(reg);
// guy , I think you can use the easy method below
etc1:
var q = document.querySelectorAll('#tr1>td');
for(var x in q){
console.log('key=' + x + ' ; ' + 'value=' + q[x]);// q[x] is you want to get!
}
etc2:
var q = document.getElementById('tr1').getElementsByTagName('td');
for(var x in q){
// TODO
}1 2
(?<=