jQuery-easyUI防止panel,dialog,window窗口超出父元素边界

<script type="text/javascript" src="../../jquery-1.8.0.min.js"></script>	<script type="text/javascript" src="../../jquery.easyui.min.js"></script>	<script type="text/javascript" src="../../plugins/jquery.resizable.js"></script>	<script type="text/javascript" src="../../plugins/jquery.draggable.js"></script>    <script>    	var ie = (function(){            var undef, v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i');            while (div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->', all[0]);            return v > 4 ? v : undef;        }());        /**         * add by cgh         * 针对panel window dialog三个组件调整大小时会超出父级元素的修正         * 如果父级元素的overflow属性为hidden，则修复上下左右个方向         * 如果父级元素的overflow属性为非hidden，则只修复上左两个方向         * @param width         * @param height         * @returns         */        var easyuiPanelOnResize = function(width, height){			if(!$.data(this,'window') && !$.data(this,'dialog')) return;						if(ie===8){				var data = $.data(this, "window") || $.data(this, "dialog");				if(data.pmask){					var masks = data.window.nextAll('.window-proxy-mask');					if(masks.length > 1){						$(masks[1]).remove();                		masks[1] = null;					}				}			}			if($(this).panel('options').maximized==true){				$(this).panel('options').fit=false;			}            $(this).panel('options').reSizing = true;			if(!$(this).panel('options').reSizeNum){				$(this).panel('options').reSizeNum = 1;			}else{				$(this).panel('options').reSizeNum++;			}		            var parentObj = $(this).panel('panel').parent();            var left = $(this).panel('panel').position().left;            var top = $(this).panel('panel').position().top;                        if ($(this).panel('panel').offset().left < 0) {                $(this).panel('move', {                    left: 0                });            }            if ($(this).panel('panel').offset().top < 0) {                $(this).panel('move', {                    top: 0                });            }                        if (left < 0) {                $(this).panel('move', {                    left: 0                }).panel('resize', {                    width: width + left                });            }            if (top < 0) {                $(this).panel('move', {                    top: 0                }).panel('resize', {                    height: height + top                });            }            if (parentObj.css("overflow") == "hidden") {				var inline = $.data(this, "window").options.inline;				if(inline==false){					parentObj = $(window);				}                 if ((width + left > parentObj.width()) && $(this).panel('options').reSizeNum > 1) {                    $(this).panel('resize', {                        width: parentObj.width() - left                    });                }                                if ((height + top > parentObj.height()) && $(this).panel('options').reSizeNum > 1) {                    $(this).panel('resize', {                        height: parentObj.height() - top                    });                }              }            $(this).panel('options').reSizing = false;        };        /**         * add by cgh         * 针对panel window dialog三个组件拖动时会超出父级元素的修正         * 如果父级元素的overflow属性为hidden，则修复上下左右个方向         * 如果父级元素的overflow属性为非hidden，则只修复上左两个方向         * @param left         * @param top         * @returns         */        var easyuiPanelOnMove = function(left, top){            if ($(this).panel('options').reSizing)                 return;            var parentObj = $(this).panel('panel').parent();            var width = $(this).panel('options').width;            var height = $(this).panel('options').height;            var right = left + width;            var buttom = top + height;            var parentWidth = parentObj.width();            var parentHeight = parentObj.height();                        if (left < 0) {                $(this).panel('move', {                    left: 0                });            }            if (top < 0) {                $(this).panel('move', {                    top: 0                });            }                        if (parentObj.css("overflow") == "hidden") {				var inline = $.data(this, "window").options.inline;				if(inline==false){					parentObj = $(window);				}                if (left > parentObj.width() - width) {                    $(this).panel('move', {                        "left": parentObj.width() - width                    });                }                if (top > parentObj.height() - height) {                    $(this).panel('move', {                        "top": parentObj.height() - height                    });                }            }        };        		$.fn.panel.defaults.onResize = easyuiPanelOnResize;		$.fn.window.defaults.onResize = easyuiPanelOnResize;		$.fn.dialog.defaults.onResize = easyuiPanelOnResize;        $.fn.window.defaults.onMove = easyuiPanelOnMove;		$.fn.panel.defaults.onMove = easyuiPanelOnMove;        $.fn.dialog.defaults.onMove = easyuiPanelOnMove;