javascript 拖动窗口的问题

Question

function drag(target,event){ var startX = event.clientX; var startY = 
event.clientY;

var origX = target.offsetLeft; var origY = target.offsetTop;

var deltaX = startX - origX; var deltaY = startY - origY;

if (target.attachEvent) { //IE事件模型 //设置该元素直接捕获该事件 target.setCapture(); 
target.attachEvent("onmousemove", moveHandler); 
target.attachEvent("onmouseup", upHandler); 
target.attachEvent("onlosecapture", upHandler); } else { 
document.addEventListener("onmousemove", moveHandler); 
document.addEventListener("onmouseup", upHandler); }

stopProp(event); if(event.preventDefault){ event.preventDefault(); }else{ 
event.returnValue = false; }

function moveHandler(evt){ if(!evt) evt = window.event;

    target.style.left = (evt.clientX- deltaX)+"px";

    target.style.top = (evt.clientY- deltaY)+"px";

    stopProp(evt); }

function upHandler(evt){ if(!evt) evt = window.event;

    if (target.detachEvent) { target.detachEvent("onlosecapture", 
    upHandler); target.detachEvent("onmouseup", upHandler); 
    target.detachEvent("onmousemove", moveHandler); 
    target.releaseCapture();} else{ 
    document.removeEventListener("onmouseup", upHandler); 
    document.removeEventListener("onmousemove", moveHandler); } 
    //阻止事件传播 
    stopProp(evt);  
}

function stopProp(evt){ if(evt.stopPropagation){ evt.stopPropagation(); 
}else{ event.cancelBubble = true; } } } 

html是onmousedown绑定方法，但是还是不能拖动，然后不能解绑事件监听器

Answer 1

我想我我还是把梦关了吧