var firstDiv;
var firstLeft;
var secondDiv;
var secondLeft;
var secondWidth;
var firstWidth;
var wholeWidth = 4040;
var i = 0;

function startmoving() {
   initialise();
   timerID = setInterval("moveimage()",20);
   /* decrise timer for faster scrolling*/
}

function initialise() {
//	debugger;
   firstDiv = $('#imgdiv1');
   secondDiv = $('#imgdiv2');

   $(firstDiv).css('left',0);
   $(secondDiv).css('left',wholeWidth);

   firstLeft = $(firstDiv).css('left');
   firstLeft = parseInt(firstLeft);

   secondLeft = $(secondDiv).css('left');
   secondLeft = parseInt(secondLeft);
   secondWidth = wholeWidth;
   firstWidth = wholeWidth;

}

function moveimage() {
   if ( ((firstWidth + firstLeft)<= 0) )
   {
       $(firstDiv).css('left',secondWidth + secondLeft);
   }

   if ( ((secondWidth + secondLeft)<= 0) )
   {
       $(secondDiv).css('left',firstWidth + firstLeft);
   }

   firstLeft = $(firstDiv).css('left');
   firstLeft = parseInt(firstLeft);

   secondLeft = $(secondDiv).css('left');
   secondLeft = parseInt(secondLeft);

   $(firstDiv).css('left',firstLeft - 1);
   $(secondDiv).css('left',secondLeft - 1);
}