//定位div(contenteditable = "true")，上传图片后，光标移到输入框后面function po_Last_Div(obj) {    if (window.getSelection) {
   //ie11 10 9 ff safari        obj.focus(); //解决ff不获取焦点无法定位问题        var range = window.getSelection();//创建range        range.selectAllChildren(obj);//range 选择obj下所有子内容        range.collapseToEnd();//光标移至最后    }    else if (document.selection) {
   //ie10 9 8 7 6 5        var range = document.selection.createRange();//创建选择对象        //var range = document.body.createTextRange();        range.moveToElementText(obj);//range定位到obj        range.collapse(false);//光标移至最后        range.select();    }};