ncbi_menu.js

ncbi源码

           l.style.pixelLeft = document.body.scrollLeft + document.body.clientWidth - l.style.pixelWidth;
		}
		if ( l.style.pixelTop + l.style.pixelHeight > document.body.scrollTop + document.body.clientHeight) {
		   l.style.pixelTop = document.body.scrollTop + document.body.clientHeight - l.style.pixelHeight;
		}

        l.Menu.xOffset = document.body.scrollLeft;
        l.Menu.yOffset = document.body.scrollTop;

    } else if (document.getElementById) {
        var l = menu.menuLayer || menu;
        hideActiveMenus(l);
        if (typeof(menu) == "string") {
            l = document.getElementById(menu);
            for (var n=0; n < menuContainers.length; n++) {
                l = menuContainers[n].menus[menu];
                for (var i=0; i<menuContainers[n].menus.length; i++) {
                    if (menu == menuContainers[n].menus[i].label) l = menuContainers[n].menus[i].menuLayer;
                    if (l) break;
                }
            }
        }
        window.ActiveMenu = l;
		offX = 14; offY = 0;
        l.style.visibility = "inherit";
        if (x != "relative")
            l.style.left = x || parseInt(window.pageX) || 0;
        if (y != "relative")
            l.style.top = y || parseInt(window.pageY) || 0;
		if ( parseInt(l.style.left) + parseInt(l.style.width) + offX > window.pageXOffset + window.innerWidth) {
           l.style.left = window.pageXOffset + window.innerWidth - parseInt(l.style.width) - offX;
		}
		if ( parseInt(l.style.top) + parseInt(l.style.height) + offY > window.pageYOffset + window.innerHeight) {
		   l.style.top = window.pageYOffset + window.innerHeight - parseInt(l.style.height) - offY;
		}

        l.Menu.xOffset = window.pageXOffset;
        l.Menu.yOffset = window.pageYOffset;
        l.Menu.container.style.background = l.Menu.menuContainerBgColor;
    }
    if (menu) {
        window.activeMenus[window.activeMenus.length] = l;
    }
}

function hideMenu(e) {

    var l = e || window.ActiveMenu;
    if (!l) return true;
    if (l.menuLayer) {
        l = l.menuLayer;
    } else if (this.visibility) {
        l = this;
    }
    if (l.menuLayer) {
        l = l.menuLayer;
    }
    var a = window.ActiveMenuItem;
    document.saveMousemove = document.onmousemove;
    document.onmousemove = mouseTracker;
    if (a && document.layers) {
        a.document.bgColor = a.saveColor;
        a.focusItem.top = -30;
        if (a.hilite) a.hilite.visibility = "hidden";
        if (a.childMenu) a.document.layers[1].document.images[0].src = a.icon;
        if (mDrag.oldX <= e.pageX+3 && mDrag.oldX >= e.pageX-3 && mDrag.oldY <= e.pageY+3 && mDrag.oldY >= e.pageY-3) {
            if (a.action && window.ActiveMenu) setTimeout('window.ActiveMenu.Menu.onMenuItemAction();', 2);
        } else if (document.saveMousemove == mDrag.doMenuDrag) {
            if (window.ActiveMenu) return true;
        }
    } else if (window.ActiveMenu && (document.all||document.getElementById)) {
        document.onmousedown=null;
        if (a) {
            a.style.backgroundColor = a.saveColor;
            if (a.hilite) a.hilite.style.visibility = "hidden";
        }
        if (document.saveMousemove == mDrag.doMenuDrag) {
            return true;
        }
	}
    if (window.ActiveMenu) {
        if (window.ActiveMenu.Menu) {
            if (window.ActiveMenu.Menu.disableHide) return true;
            e = window.event || e;
            if (!window.ActiveMenu.Menu.enableHideOnMouseOut && e.type == "mouseout") return true;
        }
    }
    hideActiveMenus(l);
    return true;
}

function hideChildMenu(menuLayer) {
    var l = menuLayer || this;
    for (var i=0; i < l.Menu.childMenus.length; i++) {
        if (document.layers) {
            l.Menu.childMenus[i].visibility = "hidden";
        } else if (document.all || document.getElementById) {
            l.Menu.childMenus[i].style.visibility = "hidden";
        }
        l.Menu.childMenus[i].Menu.hideChildMenu(l.Menu.childMenus[i]);
    }
    if (l.childMenu) {
        if (document.layers) {
            l.Menu.container.document.bgColor = null;
            l.Menu.showMenu(null,null,null,l.childMenu.layers[0]);
            l.childMenu.zIndex = l.parentLayer.zIndex +1;
            l.childMenu.top = l.top + l.parentLayer.top + l.Menu.menuLayer.top;
            if (l.childMenu.left + l.childMenu.clip.width > window.innerWidth) {
                l.childMenu.left = l.parentLayer.left - l.childMenu.clip.width + l.Menu.menuLayer.top + 15;
                l.Menu.container.clip.left -= l.childMenu.clip.width;
            } else if (l.Menu.childMenuDirection == "left") {
                l.childMenu.left = l.parentLayer.left - l.parentLayer.clip.width;
                l.Menu.container.clip.left -= l.childMenu.clip.width;
            } else {
                l.childMenu.left = l.parentLayer.left + l.parentLayer.clip.width  + l.Menu.menuLayer.left -5;
            }
            l.Menu.container.clip.width += l.childMenu.clip.width +100;
            l.Menu.container.clip.height += l.childMenu.clip.height;
            l.document.layers[1].zIndex = 0;
            l.document.layers[1].document.images[0].src = l.iconHilite;
            l.childMenu.visibility = "inherit";
        } else if (document.all) {
            l.childMenu.style.zIndex = l.Menu.menuLayer.style.zIndex +1;
            l.childMenu.style.pixelTop = l.style.pixelTop + l.Menu.menuLayer.style.pixelTop;
            if (l.childMenu.style.pixelLeft + l.childMenu.style.pixelWidth > document.width) {
                l.childMenu.style.pixelLeft = l.childMenu.style.pixelWidth + l.Menu.menuLayer.style.pixelTop + 15;
            } else if (l.Menu.childMenuDirection == "left") {
                //l.childMenu.style.pixelLeft = l.parentLayer.left - l.parentLayer.clip.width;
            } else {
                l.childMenu.style.pixelLeft = l.Menu.menuLayer.style.pixelWidth + l.Menu.menuLayer.style.pixelLeft -5;
            }
            l.childMenu.style.visibility = "inherit";
        } else if (document.getElementById) {
            l.childMenu.style.zIndex = l.Menu.menuLayer.style.zIndex +1;
            l.childMenu.style.top = l.style.top + l.Menu.menuLayer.style.top;
            if (l.childMenu.style.left + l.childMenu.style.width > document.width) {
                l.childMenu.style.left = l.childMenu.style.width + l.Menu.menuLayer.style.top + 15;
            } else if (l.Menu.childMenuDirection == "left") {
                //l.childMenu.style.pixelLeft = l.parentLayer.left - l.parentLayer.clip.width;
            } else {
                l.childMenu.style.left = l.Menu.menuLayer.style.width + l.Menu.menuLayer.style.left -5;
            }
            l.childMenu.style.visibility = "inherit";
        }
        if (!l.childMenu.disableHide)
            window.activeMenus[window.activeMenus.length] = l.childMenu;
    }
}

function hideActiveMenus(l) {
    if (!window.activeMenus) return;
    for (var i=0; i < window.activeMenus.length; i++) {
    if (!activeMenus[i]) return;
        if (activeMenus[i].visibility && activeMenus[i].Menu) {
            activeMenus[i].visibility = "hidden";
            activeMenus[i].Menu.container.visibility = "hidden";
	    if (document.getElementById) {
              activeMenus[i].Menu.container.left = 0;
            } else {
              activeMenus[i].Menu.container.clip.left = 0;
            }
        } else if (activeMenus[i].style) {
            activeMenus[i].style.visibility = "hidden";
        }
    }
    document.onmousemove = mouseTracker;
    window.activeMenus.length = 0;
}

function mouseTracker(e) {
    e = e || window.Event || window.event;
    window.pageX = e.pageX || e.clientX;
    window.pageY = e.pageY || e.clientY;
}

function setMouseTracker() {
    if (document.captureEvents) {
        document.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
    }
    document.onmousemove = this.mouseTracker;
    document.onmouseup = this.hideMenu;
}

function setMenuTracker(menu) {
    if (!window.menuTrackers) window.menuTrackers = new Array();
    menuTrackers[menuTrackers.length] = menu;
    window.menuTrackerID = setInterval('menuTracker()',10);
}

function menuTracker() {
    for (var i=0; i < menuTrackers.length; i++) {
        if (!isNaN(menuTrackers[i].xOffset) && document.layers) {
            var off = parseInt((menuTrackers[i].xOffset - window.pageXOffset) / 10);
            if (isNaN(off)) off = 0;
            if (off < 0) {
                menuTrackers[i].container.left += -off;
                menuTrackers[i].xOffset += -off;
            } else if (off > 0) {
                menuTrackers[i].container.left += -off;
                menuTrackers[i].xOffset += -off;
            }
        }
        if (!isNaN(menuTrackers[i].yOffset) && document.layers) {
            var off = parseInt((menuTrackers[i].yOffset - window.pageYOffset) / 10);
            if (isNaN(off)) off = 0;
            if (off < 0) {
                menuTrackers[i].container.top += -off;
                menuTrackers[i].yOffset += -off;
            } else if (off > 0) {
                menuTrackers[i].container.top += -off;
                menuTrackers[i].yOffset += -off;
            }
        }
        if (!isNaN(menuTrackers[i].xOffset) && document.body) {
            var off = parseInt((menuTrackers[i].xOffset - document.body.scrollLeft) / 10);
            if (isNaN(off)) off = 0;
            if (off < 0) {
                menuTrackers[i].menuLayer.style.pixelLeft += -off;
                menuTrackers[i].xOffset += -off;
            } else if (off > 0) {
                menuTrackers[i].menuLayer.style.pixelLeft += -off;
                menuTrackers[i].xOffset += -off;
            }
        }
        if (!isNaN(menuTrackers[i].yOffset) && document.body) {
            var off = parseInt((menuTrackers[i].yOffset - document.body.scrollTop) / 10);
            if (isNaN(off)) off = 0;
            if (off < 0) {
                menuTrackers[i].menuLayer.style.pixelTop += -off;
                menuTrackers[i].yOffset += -off;
            } else if (off > 0) {
                menuTrackers[i].menuLayer.style.pixelTop += -off;
                menuTrackers[i].yOffset += -off;
            }
        }
    }
}

function onMenuItemDown(e, l) {
    l = l || window.ActiveMenuItem || this;
    if (!l.Menu) {
    } else {
        if (document.layers) {
            mDrag.dragLayer = l.Menu.container;
            mDrag.startMenuDrag(e);
        } else {
            mDrag.dragLayer = l.Menu.container.style;
            mDrag.startMenuDrag(e);
            window.event.cancelBubble=true;
        }
    }
}

function startMenuDrag(e) {
    if (document.layers) {
        if (e.which > 1) {
            if (window.ActiveMenu) ActiveMenu.Menu.container.visibility = "hidden";
            window.ActiveMenu = null;
            return true;
        }
        document.captureEvents(Event.MOUSEMOVE);
        var x = e.pageX;
        var y = e.pageY;
    } else {
        var x = window.event.clientX;
        var y = window.event.clientY;
    }
    mDrag.offX = x;
    mDrag.offY = y;
    mDrag.oldX = x;
    mDrag.oldY = y;
    if (!ActiveMenu.Menu.disableDrag) document.onmousemove = mDrag.doMenuDrag;
    return false;
}

function doMenuDrag(e) {
    if (document.layers) {
        mDrag.dragLayer.moveBy(e.pageX-mDrag.offX,e.pageY-mDrag.offY);
        mDrag.offX = e.pageX;
        mDrag.offY = e.pageY;
    } else if (document.all) {
        mDrag.dragLayer.pixelLeft = window.event.offsetX;
        mDrag.dragLayer.pixelTop  = window.event.offsetY;
        return false; //for IE
    } else if (document.getElementById) {
        mDrag.dragLayer.left = window.event.offsetX;
        mDrag.dragLayer.top  = window.event.offsetY;
        return false; //for ns6
    }
}