1 //将鼠标移到文本最后
2 function set_focus(el) {
3 el.focus();
4 if (el instanceof jQuery) el = el[0];
5 //el=el[0]; //jquery 对象转dom对象
6 if ($.support.msie) {
7 var range = document.selection.createRange();
8 this.last = range;
9 range.moveToElementText(el);
10 range.select();
11 document.selection.empty(); //取消选中
12 }
13 else {
14 var range = document.createRange();
15 range.selectNodeContents(el);
16 range.collapse(false);
17 var sel = window.getSelection();//适用于firefox和safari
18 sel.removeAllRanges();//取消选中
19 sel.addRange(range);
20 }
21 }
