1.Jquery函数实现:
$(function() { /* 在textarea处插入文本--Start */ (function($) { $.fn.extend({ insertContent : function(myValue, t) { var $t = $(this)[0]; if (document.selection) { // ie this.focus(); var sel = document.selection.createRange(); sel.text = myValue; this.focus(); sel.moveStart(‘character‘, -l); var wee = sel.text.length; if (arguments.length == 2) { var l = $t.value.length; sel.moveEnd("character", wee + t); t <= 0 ? sel.moveStart("character", wee - 2 * t - myValue.length) : sel.moveStart( "character", wee - t - myValue.length); sel.select(); } } else if ($t.selectionStart || $t.selectionStart == ‘0‘) { var startPos = $t.selectionStart; var endPos = $t.selectionEnd; var scrollTop = $t.scrollTop; $t.value = $t.value.substring(0, startPos) + myValue + $t.value.substring(endPos, $t.value.length); this.focus(); $t.selectionStart = startPos + myValue.length; $t.selectionEnd = startPos + myValue.length; $t.scrollTop = scrollTop; if (arguments.length == 2) { $t.setSelectionRange(startPos - t, $t.selectionEnd + t); this.focus(); } } else { this.value += myValue; this.focus(); } } }) })(jQuery); /* 在textarea处插入文本--Ending */ });
调用方法:
$(文本域选择器).insertContent("插入的内容");
//$(文本域选择器).insertContent("插入的内容",数值); //根据数值选中插入文本内容两边的边界, 数值: 0是表示插入文字全部选择,-1表示插入文字两边各少选中一个字符。
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; } }
时间: 2024-11-05 23:36:38