var selectedMkt = 0; 
   function swap (s) { 
	if (s != selectedMkt) { 
	        setTimeout('swapImg(' + s + ')',1); 
		selectedMkt = s; 
	}
	return false; 
   } 

	function swapImg (s) { 
	    document.images.chartMkt.src = "https://www.schwab.wallst.com/charts/public/thumbnail.asp?from=SchwabRT&adjW=&adjH=&cT=ix0&tS=" + s; 
	}