<!--
var Drag = {
	obj : null,
	zIndex : 300,
	MaxWidth : null,
  MaxHeight : null,
  
  arrInit : function(handles,drags){
  	 for(var i=0;i<arrHandle.length;i++){
  	 	 var h = $(handles[i]);
  	 	 var d = $(drags[i]);
  	 	 if(!h || !d) return false;
  	 	 this.MaxWidth = parseInt(document.body.offsetWidth)-parseInt($(drags[i]).offsetWidth); 
  	 	 this.MaxHeight = parseInt(document.body.offsetHeight)-parseInt($(drags[i]).offsetHeight);
       this.init(h, d, true, 0, this.MaxWidth, 0, this.MaxHeight);
     }
  },
  
	init : function(o, oRoot, iFloat, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
	{
		if(!o || !oRoot) return false;
		
		o.setAttribute("title","按住此处可拖动！");
    o.style.cursor = "move";
		
		o.onmousedown	= Drag.start;

		o.hmode			= bSwapHorzRef ? false : true ;
		o.vmode			= bSwapVertRef ? false : true ;

		o.root = oRoot && oRoot != null ? oRoot : o ;
		o.root.onclick = function(){
			 o.root.style.zIndex = Drag.zIndex;
		   Drag.zIndex++;	
		}
			  
    if(iFloat){
    	  o.root.style.left=((parseInt(document.body.offsetWidth)-parseInt(o.root.offsetWidth))/2)+"px";
    	  o.root.style.top=alertBox.marginTop+"px";
    }
    else{	
		   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);	
		Drag.fixIndex(o);
		
		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;
    
    if(document.all){
    	if(window.opera){
    		 o.root.style.opacity = 0.5;
    	}
    	else{
			   o.root.style.filter = "alpha(opacity=80)";
		  }
		}
		else{
			o.root.style.opacity = 0.5;
		}
    
		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)

		o.root.style[o.hmode ? "left" : "right"] = nx + "px";
		o.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
		o.lastMouseX	= ex;
		o.lastMouseY	= ey;

		o.root.onDrag(nx, ny);
		return false;
	},

	end : function()
	{
		var o = Drag.obj; 
		document.onmousemove = document.onmouseup = function(){
		    if(document.all){
		    	   if(window.opera){
		             Drag.obj.root.style.opacity = 1;
		         }
		         else{
		             Drag.obj.root.style.filter = "";
		         }
	      }
	      else{
		         Drag.obj.root.style.opacity = 1;
	      }
	      return null;
	  }
		o.root.onDragEnd(parseInt(o.root.style[o.hmode ? "left" : "right"]), parseInt(o.root.style[o.vmode ? "top" : "bottom"]));
		o = 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;
	},
	
	fixIndex : function(elem){	  
		elem.root.style.zIndex = Drag.zIndex;
		Drag.zIndex++;	
	}
}
//-->