var fdobjs=document.getElementsByTagName("div");
var fdobj="";;
if(fdobjs.length>0)
{
  for(var i=0;i<fdobjs.length;i++)   
  {
        var fidname=fdobjs[i].id.split('_');
        if(fidname[1]=="fudong")
        {
           fdobj +=fdobjs[i].id+",";
        }
  }
        if(fdobj!="")
        {
            var fob=fdobj.split(',');
            var flen=fob.length-1;
        
        
            var xPos = 300;
            var yPos = 200; 
            var step = 1;
            var delay = 30; 
            var height = 0;
            var Hoffset = 0;
            var Woffset = 0;
            var yon = 0;
            var xon = 0;
            var pause = true;
            var interval;
            for(var j=0;j<flen;j++)
            {
               document.getElementById(fob[j]).style.top = yPos;
            }
            function changePos() 
            {
	            width = document.body.clientWidth;
	            height = document.body.clientHeight;
	            for(var d=0;d<flen;d++)
                {
	                Hoffset = document.getElementById(fob[d]).offsetHeight;
	                Woffset = document.getElementById(fob[d]).offsetWidth;
	                document.getElementById(fob[d]).style.left = xPos + document.body.scrollLeft;
	                document.getElementById(fob[d]).style.top = yPos + document.body.scrollTop;
	            }
	            if (yon) 
		            {yPos = yPos + step;}
	            else 
		            {yPos = yPos - step;}
	            if (yPos < 0) 
		            {yon = 1;yPos = 0;}
	            if (yPos >= (height - Hoffset)) 
		            {yon = 0;yPos = (height - Hoffset);}
	            if (xon) 
		            {xPos = xPos + step;}
	            else 
		            {xPos = xPos - step;}
	            if (xPos < 0) 
		            {xon = 1;xPos = 0;}
	            if (xPos >= (width - Woffset)) 
		            {xon = 0;xPos = (width - Woffset);   }
	            }
            	
	            function start()
	             {
	                  for(var s=0;s<flen;s++)
                      {
	 	                document.getElementById(fob[s]).visibility = "visible";
	 	              }  
		                interval = setInterval('changePos()', delay);
	            }
	            function pause_resume() 
	            {
		            if(pause) 
		            {
			            clearInterval(interval);
			            pause = false;}
		            else 
		            {
			            interval = setInterval('changePos()',delay);
			            pause = true; 
			            }
		            }
	            start();
	     }       
}