jQuery.imgAreaSelect=function(img,options){
    var $area=jQuery('<div></div>'),$border1=jQuery('<div></div>'),$border2=jQuery('<div></div>'),imgOfs,imgWidth,imgHeight,startX,startY,moveX,moveY,resizeMargin=10,resize=[],V=0,H=1,d,aspectRatio,x1,x2,y1,y2,x,y,selection={
        x1:0,
        y1:0,
        x2:0,
        y2:0,
        width:0,
        height:0
    };

    var $a=$area.add($border1).add($border2);
    function areaMouseMove(event){
        x=event.pageX-selection.x1-imgOfs.left;
        y=event.pageY-selection.y1-imgOfs.top;
        resize=[];
        if(options.resizable){
            if(y<=resizeMargin)resize[V]='n';
            else if(y>=selection.height-resizeMargin)resize[V]='s';
            if(x<=resizeMargin)resize[H]='w';
            else if(x>=selection.width-resizeMargin)resize[H]='e'
                }
                $border2.css('cursor',resize.length?resize.join('')+'-resize':options.movable?'move':'')
        }
        function areaMouseDown(event){
        if(event.which!=1)return false;
        if(options.resizable&&resize.length>0){
            $('body').css('cursor',resize.join('')+'-resize');
            x1=(resize[H]=='w'?selection.x2:selection.x1)+imgOfs.left;
            y1=(resize[V]=='n'?selection.y2:selection.y1)+imgOfs.top;
            jQuery(document).mousemove(selectingMouseMove);
            $border2.unbind('mousemove',areaMouseMove);
            jQuery(document).one('mouseup',function(){
                resize=[];
                $('body').css('cursor','');
                if(options.autoHide)$a.hide();
                options.onSelectEnd(img,selection);
                jQuery(document).unbind('mousemove',selectingMouseMove);
                $border2.mousemove(areaMouseMove)
                })
            }else if(options.movable){
            moveX=selection.x1+imgOfs.left;
            moveY=selection.y1+imgOfs.top;
            startX=event.pageX;
            startY=event.pageY;
            jQuery(document).mousemove(movingMouseMove).one('mouseup',function(){
                options.onSelectEnd(img,selection);
                jQuery(document).unbind('mousemove',movingMouseMove)
                })
            }else jQuery(img).mousedown(event);
        return false
        }
        function aspectRatioXY(){
        x2=Math.max(imgOfs.left,Math.min(imgOfs.left+imgWidth,x1+Math.abs(y2-y1)*aspectRatio*(x2>x1?1:-1)));
        y2=Math.round(Math.max(imgOfs.top,Math.min(imgOfs.top+imgHeight,y1+Math.abs(x2-x1)/aspectRatio*(y2>y1?1:-1))));
        x2=Math.round(x2)
        }
        function aspectRatioYX(){
        y2=Math.max(imgOfs.top,Math.min(imgOfs.top+imgHeight,y1+Math.abs(x2-x1)/aspectRatio*(y2>y1?1:-1)));
        x2=Math.round(Math.max(imgOfs.left,Math.min(imgOfs.left+imgWidth,x1+Math.abs(y2-y1)*aspectRatio*(x2>x1?1:-1))));
        y2=Math.round(y2)
        }
        function selectingMouseMove(event){
        x2=!resize.length||resize[H]||aspectRatio?event.pageX:selection.x2+imgOfs.left;
        y2=!resize.length||resize[V]||aspectRatio?event.pageY:selection.y2+imgOfs.top;
        if(options.minWidth&&Math.abs(x2-x1)<options.minWidth){
            x2=x1-options.minWidth*(x2<x1?1:-1);
            if(x2<imgOfs.left)x1=imgOfs.left+options.minWidth;
            else if(x2>imgOfs.left+imgWidth)x1=imgOfs.left+imgWidth-options.minWidth
                }
                if(options.minHeight&&Math.abs(y2-y1)<options.minHeight){
            y2=y1-options.minHeight*(y2<y1?1:-1);
            if(y2<imgOfs.top)y1=imgOfs.top+options.minHeight;
            else if(y2>imgOfs.top+imgHeight)y1=imgOfs.top+imgHeight-options.minHeight
                }
                x2=Math.max(imgOfs.left,Math.min(x2,imgOfs.left+imgWidth));
        y2=Math.max(imgOfs.top,Math.min(y2,imgOfs.top+imgHeight));
        if(aspectRatio)if(Math.abs(x2-x1)/aspectRatio>Math.abs(y2-y1))aspectRatioYX();else aspectRatioXY();
        if(options.maxWidth&&Math.abs(x2-x1)>options.maxWidth){
            x2=x1-options.maxWidth*(x2<x1?1:-1);
            if(aspectRatio)aspectRatioYX()
                }
                if(options.maxHeight&&Math.abs(y2-y1)>options.maxHeight){
            y2=y1-options.maxHeight*(y2<y1?1:-1);
            if(aspectRatio)aspectRatioXY()
                }
                selection.x1=Math.min(x1,x2)-imgOfs.left;
        selection.x2=Math.max(x1,x2)-imgOfs.left;
        selection.y1=Math.min(y1,y2)-imgOfs.top;
        selection.y2=Math.max(y1,y2)-imgOfs.top;
        selection.width=Math.abs(x2-x1);
        selection.height=Math.abs(y2-y1);
        $a.css({
            left:(selection.x1+imgOfs.left)+'px',
            top:(selection.y1+imgOfs.top)+'px',
            width:Math.max(selection.width-options.borderWidth*2,0)+'px',
            height:Math.max(selection.height-options.borderWidth*2,0)+'px'
            });
        options.onSelectChange(img,selection);
        return false
        }
        function movingMouseMove(event){
        x1=Math.max(imgOfs.left,Math.min(moveX+event.pageX-startX,imgOfs.left+imgWidth-selection.width));
        y1=Math.max(imgOfs.top,Math.min(moveY+event.pageY-startY,imgOfs.top+imgHeight-selection.height));
        x2=x1+selection.width;
        y2=y1+selection.height;
        selection.x1=x1-imgOfs.left;
        selection.y1=y1-imgOfs.top;
        selection.x2=x2-imgOfs.left;
        selection.y2=y2-imgOfs.top;
        $a.css({
            left:x1+'px',
            top:y1+'px',
            width:Math.max(x2-x1-options.borderWidth*2,0)+'px',
            height:Math.max(y2-y1-options.borderWidth*2,0)+'px'
            });
        options.onSelectChange(img,selection);
        event.preventDefault();
        return false
        }
        this.setOptions=function(newOptions){
        options=jQuery.extend(options,newOptions);
        if(newOptions.x1!=null){
            x1=(selection.x1=newOptions.x1)+imgOfs.left;
            y1=(selection.y1=newOptions.y1)+imgOfs.top;
            x2=(selection.x2=newOptions.x2)+imgOfs.left;
            y2=(selection.y2=newOptions.y2)+imgOfs.top;
            selection.width=x2-x1;
            selection.height=y2-y1;
            $a.show().css({
                left:x1+'px',
                top:y1+'px',
                width:Math.max(x2-x1-options.borderWidth*2,0)+'px',
                height:Math.max(y2-y1-options.borderWidth*2,0)+'px'
                });
            options.onSelectChange(img,selection)
            }
            if(newOptions.hide)$a.hide();
        else if(newOptions.show)$a.show();
        $a.css({
            borderWidth:options.borderWidth+'px'
            });
        $area.css({
            backgroundColor:options.selectionColor,
            opacity:options.selectionOpacity
            });
        $border1.css({
            borderStyle:'solid',
            borderColor:options.borderColor1
            });
        $border2.css({
            borderStyle:'dashed',
            borderColor:options.borderColor2
            });
        aspectRatio=options.aspectRatio&&(d=options.aspectRatio.split(/:/))?d[0]/d[1]:null
        };

    imgWidth=jQuery(img).width();
    imgHeight=jQuery(img).height();
    imgOfs=jQuery(img).offset();
    if(jQuery.browser.msie)jQuery(img).attr('unselectable','on');
    $a.css({
        display:'none',
        position:'absolute',
        lineHeight:'0px',
        fontSize:'0px'
    });
    $area.css({
        borderStyle:'solid'
    });
    jQuery('body').append($a);
    initOptions={
        borderColor1:'#000',
        borderColor2:'#fff',
        borderWidth:1,
        movable:true,
        resizable:true,
        selectionColor:'#fff',
        selectionOpacity:0.2,
        onSelectStart:function(){},
        onSelectChange:function(){},
        onSelectEnd:function(){}
    };

options=jQuery.extend(initOptions,options);
    this.setOptions(options);
    if(options.resizable||options.movable)$a.mousemove(areaMouseMove).mousedown(areaMouseDown);
    jQuery(img).mousedown(function(event){
    if(event.which!=1)return false;
    startX=x1=event.pageX;
    startY=y1=event.pageY;
    resize=[];
    $a.show().css({
        width:'0px',
        height:'0px',
        left:x1,
        top:y1
    });
    jQuery(document).mousemove(selectingMouseMove);
    $border2.unbind('mousemove',areaMouseMove);
    selection.x1=selection.x2=x1-imgOfs.left;
    selection.y1=selection.y2=y1-imgOfs.top;
    options.onSelectStart(img,selection);
    jQuery(document).one('mouseup',function(){
        if(options.autoHide)$a.hide();
        options.onSelectEnd(img,selection);
        jQuery(document).unbind('mousemove',selectingMouseMove);
        $border2.mousemove(areaMouseMove)
        });
    return false
    })
};

jQuery.fn.imgAreaSelect=function(options){
    options=options||{};

    this.each(function(){
        if(jQuery(this).data('imgAreaSelect'))jQuery(this).data('imgAreaSelect').setOptions(options);else jQuery(this).data('imgAreaSelect',new jQuery.imgAreaSelect(this,options))
            });
    return this
    };