=IE支持document.selection =Firefox,Chrome,Safari以及Opera都有selectionStart和selectionEnd属性 复制代码 代码如下: function insertText(obj,str) { if (document.selection) { var sel = document.selection.createRange(); sel.text = str; } else if (typeof obj.selectionStart === 'number' && typeof obj.selectionEnd === 'number') { var startPos = obj.selectionStart, endPos = obj.selectionEnd, cursorPos = startPos, tmpStr = obj.value; obj.value = tmpStr.substring(0, startPos) + str + tmpStr.substring(endPos, tmpStr.length); cursorPos += str.length; obj.selectionStart = obj.selectionEnd = cursorPos; } else { obj.value += str; } } function moveEnd(obj){ obj.focus(); var len = obj.value.length; if (document.selection) { var sel = obj.createTextRange(); sel.moveStart('character',len); sel.collapse(); sel.select(); } else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') { obj.selectionStart = obj.selectionEnd = len; } } 复制代码 代码如下: 复制代码 代码如下: