1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
| <script> var sel =document.getElementById('sel'); sel.observes =[]; sel.attach =function (obj) { sel.observes[sel.observes.length] = obj; };
sel.detach = function (obj) { for( var i=0; i < sel.observes.length; i++) { if(this.observes[i] == obj) { delete this.observes[i]; } } };
sel.onchange = sel.notify =function () { for( var i=0; i < sel.observes.length; i++) { // this.observes[i].update(this); } }; var test2 = document.getElementById('test2'); var test3 = document.getElementById('test3'); test3.update = function (sel) { if(sel.value == '1'){ this.innerHTML = '2'; } else if(sel.value == '0') { this.innerHTML ='a'; } }; test2.update = function (sel) { if(sel.value == '1'){ this.innerHTML = '1'; } else if(sel.value == '0') { this.innerHTML ='s'; } };
sel.attach(test2); sel.attach(test3); </script>
|