var Drag={obj:null,init:function(o,oRoot,minX,maxX,minY,maxY,bSwapHorzRef,bSwapVertRef,fXMapper,fYMapper)
{o.onmousedown=Drag.start;o.hmode=bSwapHorzRef?false:true;o.vmode=bSwapVertRef?false:true;o.root=oRoot&&oRoot!=null?oRoot:o;if(o.hmode&&isNaN(parseInt(o.root.style.left)))o.root.style.left="0px";if(o.vmode&&isNaN(parseInt(o.root.style.top)))o.root.style.top="0px";if(!o.hmode&&isNaN(parseInt(o.root.style.right)))o.root.style.right="0px";if(!o.vmode&&isNaN(parseInt(o.root.style.bottom)))o.root.style.bottom="0px";o.minX=typeof minX!='undefined'?minX:null;o.minY=typeof minY!='undefined'?minY:null;o.maxX=typeof maxX!='undefined'?maxX:null;o.maxY=typeof maxY!='undefined'?maxY:null;o.xMapper=fXMapper?fXMapper:null;o.yMapper=fYMapper?fYMapper:null;o.root.onDragStart=new Function();o.root.onDragEnd=new Function();o.root.onDrag=new Function();},start:function(e)
{var o=Drag.obj=this;e=Drag.fixE(e);var y=parseInt(o.vmode?o.root.style.top:o.root.style.bottom);var x=parseInt(o.hmode?o.root.style.left:o.root.style.right);o.root.onDragStart(x,y);o.lastMouseX=e.clientX;o.lastMouseY=e.clientY;if(o.hmode){if(o.minX!=null)o.minMouseX=e.clientX-x+o.minX;if(o.maxX!=null)o.maxMouseX=o.minMouseX+o.maxX-o.minX;}else{if(o.minX!=null)o.maxMouseX=-o.minX+e.clientX+x;if(o.maxX!=null)o.minMouseX=-o.maxX+e.clientX+x;}
if(o.vmode){if(o.minY!=null)o.minMouseY=e.clientY-y+o.minY;if(o.maxY!=null)o.maxMouseY=o.minMouseY+o.maxY-o.minY;}else{if(o.minY!=null)o.maxMouseY=-o.minY+e.clientY+y;if(o.maxY!=null)o.minMouseY=-o.maxY+e.clientY+y;}
document.onmousemove=Drag.drag;document.onmouseup=Drag.end;return false;},drag:function(e)
{e=Drag.fixE(e);var o=Drag.obj;var ey=e.clientY;var ex=e.clientX;var y=parseInt(o.vmode?o.root.style.top:o.root.style.bottom);var x=parseInt(o.hmode?o.root.style.left:o.root.style.right);var nx,ny;if(o.minX!=null)ex=o.hmode?Math.max(ex,o.minMouseX):Math.min(ex,o.maxMouseX);if(o.maxX!=null)ex=o.hmode?Math.min(ex,o.maxMouseX):Math.max(ex,o.minMouseX);if(o.minY!=null)ey=o.vmode?Math.max(ey,o.minMouseY):Math.min(ey,o.maxMouseY);if(o.maxY!=null)ey=o.vmode?Math.min(ey,o.maxMouseY):Math.max(ey,o.minMouseY);nx=x+((ex-o.lastMouseX)*(o.hmode?1:-1));ny=y+((ey-o.lastMouseY)*(o.vmode?1:-1));if(o.xMapper)nx=o.xMapper(y)
else if(o.yMapper)ny=o.yMapper(x)
Drag.obj.root.style[o.hmode?"left":"right"]=nx+"px";Drag.obj.root.style[o.vmode?"top":"bottom"]=ny+"px";Drag.obj.lastMouseX=ex;Drag.obj.lastMouseY=ey;Drag.obj.root.onDrag(nx,ny);return false;},end:function()
{document.onmousemove=null;document.onmouseup=null;Drag.obj.root.onDragEnd(parseInt(Drag.obj.root.style[Drag.obj.hmode?"left":"right"]),parseInt(Drag.obj.root.style[Drag.obj.vmode?"top":"bottom"]));Drag.obj=null;},fixE:function(e)
{if(typeof e=='undefined')e=window.event;if(typeof e.layerX=='undefined')e.layerX=e.offsetX;if(typeof e.layerY=='undefined')e.layerY=e.offsetY;return e;}};