JS仿iGoogle自定义首页模块拖拽特效的方法(6)

//FireFox 去除容器内拖拽图片问题
                    if (ev.preventDefault) {
                        ev.preventDefault();
                        ev.stopPropagation();
                    }

document.onmousemove = function(e) {
                        if (dragObj.moveable) {
                            var ev = e || window.event || Common.getEvent();
                            //IE 去除容器内拖拽图片问题
                            if (document.all) //IE
                            {
                                ev.returnValue = false;
                            }

var movePos = Common.getMousePos(ev);
                            dragDiv.style.left = Math.max(Math.min(movePos.x - dragObj.tmpX, dragObj.dragArea.maxRight), dragObj.dragArea.maxLeft) + "px";
                            dragDiv.style.top = Math.max(Math.min(movePos.y - dragObj.tmpY, dragObj.dragArea.maxBottom), dragObj.dragArea.maxTop) + "px";

var targetDiv = null;
                            for (var k = 0; k < dragObj.dragArray.length; k++) {
                                if (dragDiv == dragObj.dragArray[i]) {
                                    continue;
                                }

if (movePos.x > dragObj.dragArray[k].PosLeft && movePos.x < dragObj.dragArray[k].PosLeft + dragObj.dragArray[k].PosWidth
                                    && movePos.y > dragObj.dragArray[k].PosTop && movePos.y < dragObj.dragArray[k].PosTop + dragObj.dragArray[k].PosHeight
                                ) {
                                    targetDiv = document.getElementById(dragObj.dragArray[k].DragId);
                                    if (movePos.y < dragObj.dragArray[k].PosTop + dragObj.dragArray[k].PosHeight / 2) {
                                        //往上移
                                        dashedElement.style.width = targetDiv.offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";
                                        targetDiv.parentNode.insertBefore(dashedElement, targetDiv);
                                    }
                                    else {
                                        //往下移
                                        dashedElement.style.width = targetDiv.offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";
                                        if (targetDiv.nextSibling) {
                                            targetDiv.parentNode.insertBefore(dashedElement, targetDiv.nextSibling);
                                        }
                                        else {
                                            targetDiv.parentNode.appendChild(dashedElement);
                                        }
                                    }
                                }
                            }
                           
                            for (j = 0; j < dragTbl.rows[0].cells.length; j++) {
                                var startLeft = Common.getElementPos(dragTbl.rows[0].cells[j]).x;
                                if (movePos.x > startLeft && movePos.x < startLeft + dragTbl.rows[0].cells[j].offsetWidth) {
                                    ///列无DIV
                                    if (dragTbl.rows[0].cells[j].getElementsByTagName("div").length == 0) {
                                        dashedElement.style.width = dragTbl.rows[0].cells[j].offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";
                                        dragTbl.rows[0].cells[j].appendChild(dashedElement);
                                    }
                                    else {
                                        var posFirstChild = Common.getElementPos(Common.firstChild(dragTbl.rows[0].cells[j], "DIV"));
                                        var posLastChild = Common.getElementPos(Common.lastChild(dragTbl.rows[0].cells[j], "DIV"));
                                        //处理特殊情况：在最上/下面MOVE时不碰到现有DIV的情况下，又回到起始拖拽的列最上/下方
                                        var tmpUp, tmpDown;
                                        if (tmpObj.colId == j) {
                                            tmpUp = tmpObj.firstChildUp;
                                            tmpDown = tmpObj.lastChildDown;
                                        }
                                        else {
                                            tmpUp = posFirstChild.y;
                                            tmpDown = posLastChild.y + Common.lastChild(dragTbl.rows[0].cells[j], "DIV").offsetHeight;
                                        }