floater.js

asp开发的学籍管理系统

self.onError=null;

        currentX = currentY = 0;
        whichIt = null;
        lastScrollX = 0; lastScrollY = 0;
        NS = (document.layers) ? 1 : 0;
        IE = (document.all) ? 1: 0;
        <!-- STALKER CODE -->
        function heartBeat() {
                if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }
            if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
                if(diffY != lastScrollY) {
                        percent = .1 * (diffY - lastScrollY);
                        if(percent > 0) percent = Math.ceil(percent);
                        else percent = Math.floor(percent);
                                        if(IE) document.all.floater.style.pixelTop += percent;
                                        if(NS) document.floater.top += percent;
                        lastScrollY = lastScrollY + percent;
            }
                if(diffX != lastScrollX) {
                        percent = .1 * (diffX - lastScrollX);
                        if(percent > 0) percent = Math.ceil(percent);
                        else percent = Math.floor(percent);
                        if(IE) document.all.floater.style.pixelLeft += percent;
                        if(NS) document.floater.left += percent;
                        lastScrollX = lastScrollX + percent;
                }
        }
        <!-- /STALKER CODE -->
        <!-- DRAG DROP CODE -->

        function grabIt(e) {
                if(IE) {
                        whichIt = event.srcElement;
                        while (whichIt.id.indexOf("floater") == -1) {
                                whichIt = whichIt.parentElement;
                                if (whichIt == null) { return true; }
                    }
                        whichIt.style.pixelLeft = whichIt.offsetLeft;
                    whichIt.style.pixelTop = whichIt.offsetTop;
                        currentX = (event.clientX + document.body.scrollLeft);
                           currentY = (event.clientY + document.body.scrollTop);
                } else {
                window.captureEvents(Event.MOUSEMOVE);
                if(checkFocus (e.pageX,e.pageY)) {
                        whichIt = document.floater;
                        StalkerTouchedX = e.pageX-document.floater.pageX;
                        StalkerTouchedY = e.pageY-document.floater.pageY;
                }
                }
            return true;
        }
        function moveIt(e) {
                if (whichIt == null) { return false; }
                if(IE) {
                    newX = (event.clientX + document.body.scrollLeft);
                    newY = (event.clientY + document.body.scrollTop);
                    distanceX = (newX - currentX);    distanceY = (newY - currentY);
                    currentX = newX;    currentY = newY;
                    whichIt.style.pixelLeft += distanceX;
                    whichIt.style.pixelTop += distanceY;
                        if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;
                        if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft;
                        if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;
                        if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;
                        event.returnValue = false;
                } else {
                        whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);
                if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;
                if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;
                if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;
                if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;
                return false;
                }
            return false;
        }
        function dropIt() {
                whichIt = null;
            if(NS) window.releaseEvents (Event.MOUSEMOVE);
            return true;
        }
        <!-- DRAG DROP CODE -->
        if(NS) {
                window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);
                window.onmousedown = grabIt;
                 window.onmousemove = moveIt;
                window.onmouseup = dropIt;
        }
        if(IE) {
                document.onmousedown = grabIt;
                 document.onmousemove = moveIt;
                document.onmouseup = dropIt;
        }
        if(NS || IE) action = window.setInterval("heartBeat()",1);