对于文本
<input>元素，将执行以下操作。该示例在输入中仅选择单词“ two”：
function setInputSelection(input, startPos, endPos) { input.focus(); if (typeof input.selectionStart != "undefined") { input.selectionStart = startPos; input.selectionEnd = endPos; } else if (document.selection && document.selection.createRange) { // IE branch input.select(); var range = document.selection.createRange(); range.collapse(true); range.moveEnd("character", endPos); range.moveStart("character", startPos); range.select(); }}document.getElementById("setSelection").onmousedown = function() { var input = document.getElementById("i"); setInputSelection(input, 4, 7); return false;};<input id="i" type="text" value="One two three"><input type="button" value="Set selection" id="setSelection">
