可以拖拽的弹出层(并兑现最大化,最小化,iframe/HTML)

//拖拽对象
function drag(elementToDrag, event) {
    var startX = event.clientX, startY = event.clientY;    
    var origX = elementToDrag.offsetLeft, origY = elementToDrag.offsetTop;
    var deltaX = startX - origX, deltaY = startY - origY;
    if (document.addEventListener) {
        document.addEventListener("mousemove", moveHandler, true);
        document.addEventListener("mouseup", upHandler, true);
    }
    else if (document.attachEvent) {
        elementToDrag.setCapture();
        elementToDrag.attachEvent("onmousemove", moveHandler);
        elementToDrag.attachEvent("onmouseup", upHandler);
        elementToDrag.attachEvent("onlosecapture", upHandler);
    }
    else {
        var oldmovehandler = document.onmousemove;
        var olduphandler = document.onmouseup;
        document.onmousemove = moveHandler;
        document.onmouseup = upHandler;
    }
    if (event.stopPropagation) event.stopPropagation();
    else event.cancelBubble = true;                      
    if (event.preventDefault) event.preventDefault(); 
    else event.returnValue = false;
    function moveHandler(e) {
        if (!e) e = window.event;
        elementToDrag.style.left = (e.clientX - deltaX) + "px";
        elementToDrag.style.top = (e.clientY - deltaY) + "px";
		if(e.clientX - deltaX<0)elementToDrag.style.left = "0px";//out of screen
		if(e.clientY - deltaY<0)elementToDrag.style.top = "0px";//out of screen
        if (e.stopPropagation) e.stopPropagation();
        else e.cancelBubble = true;
    }
    function upHandler(e) {
        if (!e) e = window.event;
        if (document.removeEventListener) {
            document.removeEventListener("mouseup", upHandler, true);
            document.removeEventListener("mousemove", moveHandler, true);
        }
        else if (document.detachEvent) {
            elementToDrag.detachEvent("onlosecapture", upHandler);
            elementToDrag.detachEvent("onmouseup", upHandler);
            elementToDrag.detachEvent("onmousemove", moveHandler);
            elementToDrag.releaseCapture();
        }
        else {
            document.onmouseup = olduphandler;
            document.onmousemove = oldmovehandler;
        }

        if (e.stopPropagation) e.stopPropagation();
        else e.cancelBubble = true;
    }
}
//window 弹出层
var win = function() {
    this.imageURL = "http://www.gpsoo.net/dealer/images/";
	this.nullUrl = "http://www.gpsoo.net/images/";
};
win.prototype.openWinLayer = function(title, htmlStr, width, height, contentType, win, callback)
 {
    overWindow = win;
    this.closeWinLayer();
    var title = '<div id="tit" onmousedown=\'drag(document.getElementById("openWinLayerDIV"),event)\' style="height:24px;background:#2b98cd;color:#FFF;cursor:move;"><div style="float:left;width:auto;padding-left:10px;height:24px;line-height:24px;font-size:12px;font-weight:bold;">' + title + '</div><div style="float:right;padding-right:4px;padding-top:3px;"><a style="cursor:pointer;" onclick="win.minWinLayer(\'' + title + '\');"><img src="' + this.imageURL + 'iw_min.gif" border="0" /></a><a><img src="' + this.nullUrl + 'null.gif" width="5" height="14" border="0" /></a><a style="cursor:pointer;" onclick="win.closeWinLayer();"><img src="' + this.imageURL + 'iw_close.gif" border="0" /></a></div></div>';
    var contentDiv = top.document.createElement("div");
    contentDiv.style.width = (width - 2) + "px";
    contentDiv.style.height = (height - 28) + "px";
    if (contentType == 2) {
        var temp = "<iframe width='100%' style='height:" + (height - 28) + "px' name='openWinLayerIframe' id='openWinLayerIframe' src='" + htmlStr + "' frameborder='0' scrolling='" + 'auto' + "'></iframe>";
        contentDiv.innerHTML = temp;
    } else {
        contentDiv.innerHTML = htmlStr;
    }
    var container = document.createElement("div");
    container.id = "openWinLayerDIV";
    container.style.width = width + "px";
    container.style.height = height + "px";
    container.style.position = "absolute";
    container.style.zIndex = 100;
    container.style.border = "5px solid #abbed8";
    container.style.fontSize = "13px";
	container.style.opacity = "0.98";
	container.style.filter = 'alpha(opacity=98)';
    container.style.top = (((document.documentElement.clientHeight - height) / 2) + document.documentElement.scrollTop) + "px";
    container.style.left = (document.documentElement.clientWidth - width) / 2 + "px";
    container.style.backgroundColor = "#fff";
    container.innerHTML = title;
    container.appendChild(contentDiv);
    document.body.appendChild(container);
};
win.prototype.closeWinLayer = function()
 {
    var _openLayer = top.document.getElementById("openWinLayerDIV");
    if (_openLayer != null) {
        _openLayer.parentNode.removeChild(_openLayer);
    }
    var _openLayer_maxmin = top.document.getElementById("openWinLayerDIV_maxmin");
    if (_openLayer_maxmin != null) {
        _openLayer_maxmin.parentNode.removeChild(_openLayer_maxmin);
    }
};
win.prototype.minWinLayer = function(title)
 {
    var _openLayer = top.document.getElementById("openWinLayerDIV");
    if (_openLayer != null) {
        _openLayer.style.display = "none";
    }
    var title = '<div onmousedown=\'drag(document.getElementById("openWinLayerDIV_maxmin"),event)\' style="height:24px;background:#2b98cd;color:#FFF;cursor:move;"><div style="float:left;width:auto;padding-left:10px;height:24px;line-height:24px;font-size:12px;font-weight:bold;">' + title + '</div><div style="float:right;padding-right:4px;padding-top:3px;"><a style="cursor:pointer;" onclick="win.maxWinLayer();"><img src="' + this.imageURL + 'iw_max.gif" border="0" /></a><a><img src="' + this.nullUrl + 'null.gif" width="5" height="14" border="0" /></a><a style="cursor:pointer;" onclick="win.closeWinLayer();"><img src="' + this.imageURL + 'iw_close.gif" border="0" /></a></div></div>';
    var contentDiv = top.document.createElement("div");
    contentDiv.id = "openWinLayerDIV_maxmin";
    contentDiv.style.width = "200px";
    contentDiv.style.height = "24px";
    contentDiv.style.border = "2px solid #abbed8";
    contentDiv.style.position = "absolute";
    contentDiv.style.zIndex = 100;
    contentDiv.style.fontSize = "13px";
    contentDiv.style.top = ((document.documentElement.clientHeight - 40) + document.documentElement.scrollTop) + "px";
    contentDiv.style.left = "10px";
    contentDiv.innerHTML = title;
    document.body.appendChild(contentDiv);
};
win.prototype.maxWinLayer = function()
 {
    var _openLayer_maxmin = top.document.getElementById("openWinLayerDIV_maxmin");
    if (_openLayer_maxmin != null) {
        _openLayer_maxmin.parentNode.removeChild(_openLayer_maxmin);
    }
    var _openLayer = top.document.getElementById("openWinLayerDIV");
    if (_openLayer != null) {
        _openLayer.style.display = "block";
    }
};
var win = new win();//创建win对象
//调用:
//win.openWinLayer("窗口名称","http://www.baidu.com",300,150,2,window,null);