javascript - how to set focus in required index on textbox for opera

Question

i'm having a textbox where i need to set focus/ cursor at required index of the textbox in opera browser.

Answer 1

工作演示

function SetCaretPosition(elemId, caretPos) {
    var elem = document.getElementById(elemId);

    if(elem != null) {
        if(elem.createTextRange) {
            var range = elem.createTextRange();
            range.move('character', caretPos);
            range.select();
        }
        else {
            if(elem.selectionStart) {
                elem.focus();
                elem.setSelectionRange(caretPos, caretPos);
            }
            else
                elem.focus();
        }
    }
}

elemId：元素的id

caretPos：光标的位置

Answer 2

您的代码工作正常，但在歌剧中发生冲突。

因为下面的代码片段

if(elem.createTextRange) {

Opera 也是如此，但 createTextRange 仅受 IE 支持。

所以我对你的代码做了一点修改

function SetCaretPosition(elemId, caretPos) {
    var elem = document.getElementById(elemId);

    if (elem != null) {
        if ($.browser.msie) {
            if (elem.createTextRange) {
                var range = elem.createTextRange();
                range.move('character', caretPos);
                range.select();
            }
        }
        else {
            if (elem.selectionStart) {
                elem.focus();
                elem.setSelectionRange(caretPos, caretPos);
            }
            else
                elem.focus();
        }
    }
}