javascript光标定位

来源：互联网发布：mac中qq截图快捷键编辑：程序博客网时间：2024/06/06 20:06

一、C#代码调用

ScriptManager.RegisterStartupScript(this, this.GetType(), "focusSearchActiveObject", "focusSearchActiveObject('" + searchFieldId + "');", true);

二、javascript代码

function focusSearchActiveObject(searchID) {    var searchContainer = document.getElementById(searchID);    var targetSubControl = findSubControlByName(searchContainer, getActiveNameFromCookie());    if (targetSubControl != null) {        targetSubControl.focus();        if (targetSubControl.tagName.toLowerCase() == "input") {            var rtextRange = targetSubControl.createTextRange();            rtextRange.moveStart("character", targetSubControl.value.length);            rtextRange.collapse(true);            rtextRange.select();        }    }    clearActiveNameOnCookie();}function findSubControlByName(containerObject, subControlName) {    var targetSubControl = null;    for (var i = 0; i < containerObject.childNodes.length; i++) {        if (isFormControl(containerObject.childNodes[i])) {            if (containerObject.childNodes[i].getAttribute("name") == subControlName) {                targetSubControl = containerObject.childNodes[i];                break;            }        }        else {            if (containerObject.childNodes[i].childNodes.length > 0) {                targetSubControl = findSubControlByName(containerObject.childNodes[i], subControlName);                if (targetSubControl != null) {                    break;                }            }        }    }    return targetSubControl;}function isFormControl(control) {    if (control.tagName == undefined) {        return false;    }    if (control.tagName.toLowerCase() == "input") {        return true;    }    else if (control.tagName.toLowerCase() == "select") {        return true;    }    else if (control.tagName.toLowerCase() == "textarea") {        return true;    }    else {        return false;    }}function setActiveNameToCookie(objName) {    var str = "input_currentActive=" + objName;    document.cookie = str;}function getActiveNameFromCookie() {    var arrStr = document.cookie.split("; ");    for (var i = 0; i < arrStr.length; i++) {        var temp = arrStr[i].split("=");        if (temp[0] == "input_currentActive")            return unescape(temp[1]);    }}function clearActiveNameOnCookie() {    var date = new Date();    date.setTime(date.getTime() - 10000);    document.cookie = "input_currentActive=''; expires=" + date.toGMTString();}

参考：

http://www.ibulabula.com/?p=195

0 0