intWidth = window.document.body.clientWidth;
if(intWidth<smallwidth){ 
	imediamega.innerHTML = "";
	}
else if (intWidth<largewidth) {
	if (frameShown == 'large') {
		imediamega.innerHTML = (smallIframe!='' ? smallIframe : largeIframe);
		frameShown = 'small';
		}
	}
else if (frameShown == 'small') {
        	imediamega.innerHTML = (largeIframe!='' ? largeIframe : smallIframe);
        	frameShown = 'large';
        	}