Вадим

$.extend( {
		    saveSelection: function() {
		        SelectionProvider = new Object();
		 
		        if (window.getSelection) {
		            sel = window.getSelection();
		            if (sel.getRangeAt && sel.rangeCount) {
		                SelectionProvider.storedSelection = sel.getRangeAt(0);
		            }
		        } else if (document.selection && document.selection.createRange) {
		            SelectionProvider.storedSelection = document.selection.createRange();
		        }
		        // SelectionProvider.storedSelection = null;
		         
		    }
		});

		$.extend( {
		    restoreSelection: function() {
		         
		        var range = SelectionProvider.storedSelection;
		        if (range) {
		            if (window.getSelection) {
		                sel = window.getSelection();
		                sel.removeAllRanges();
		                sel.addRange(range);
		            } else if (document.selection && range.select) {
		                range.select();
		            }
		        }
		         
		    }
		});

		$.extend( {
		    pasteHtmlAtCursor: function(html) {
		        var sel, range;
		        if (window.getSelection) {
		            sel = window.getSelection();
		            if (sel.getRangeAt && sel.rangeCount) {
		                range = sel.getRangeAt(0);
		                range.deleteContents();
		 
		                var el = document.createElement("div");
		                el.innerHTML = html;
		                var frag = document.createDocumentFragment(), node, lastNode;
		                while ((node = el.firstChild)) {
		                    lastNode = frag.appendChild(node);
		                }
		                range.insertNode(frag);
		 
		                if (lastNode) {
		                    range = range.cloneRange();
		                    range.setStartAfter(lastNode);
		                    range.collapse(true);
		                    sel.removeAllRanges();
		                    sel.addRange(range);
		                }
		            }
		        } else if (document.selection && document.selection.type != "Control") {
		            document.selection.createRange().pasteHTML(html);
		        }      
		    }
		});

$.restoreSelection(); //загружаем позицию курсора
$.pasteHtmlAtCursor(html); //вставляем код