if (document.images) {
//vars to update with the paths to images
var djiaOn ="http://chart.bigcharts.com/custom/earthlink-net/earthlink-tab-dow.img";
var nasOn ="http://chart.bigcharts.com/custom/earthlink-net/earthlink-tab-nas.img";
var spxOn ="http://chart.bigcharts.com/custom/earthlink-net/earthlink-tab-snp.img";
}

function reFresh(whichmap,myImg){
/* updates image object */
if (document.images) {
	document.images[whichmap].src=myImg;
  }
}