winiekana = (navigator.appVersion.toLowerCase().indexOf("msie") != -1 && navigator.appVersion.toLowerCase().indexOf("windows") != -1) ? true : false;

if (winiekana){
	var ieversion = navigator.appVersion.toLowerCase().match(/msie (\d)/);
		ieversion = RegExp.$1;
	if (ieversion == 6)	{ document.execCommand("BackgroundImageCache", false, true);}
}

function chg(e, f)	{e.src = f;}
function on(e){ e.style.color = '#ff3300';}
function of(e){ e.style.color = '#0000ff';}