function clip() {
 	// width of the banner container
 	var contWidth = 570;
 	// height of the banner container
 	var contHeight = 130;

 	var id1 = document.getElementById('slideA');
 	var id2 = document.getElementById('slideB');
 	var width1 = id1.offsetWidth;
	var width2 = id2.offsetWidth;

 	id1.style.left = parseInt(id1.style.left)-1 + 'px';
		
 	document.getElementById('slideCont').style.height = contHeight + "px";
 	document.getElementById('slideCont').style.clip = 'rect(auto,'+ contWidth +'px,' + contHeight +'px,auto)';
 
 	id2.style.left = parseInt(id2.style.left)-1 + 'px';
 	
 	if(parseFloat(id1.style.left) == -(width1/1)) {
  		id1.style.left = '570px';
 	}
	if(parseFloat(id1.style.left) == 0) {
  		id2.style.left = '570px';
 	}		
 	setTimeout(clip,30)
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function() {
  clip();
});