window.onresize = doResize;
function doResize(){
	var myWidth = 0, myHeight = 0;
	var widthLimit = 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		widthLimit = 1281;
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		widthLimit = 1281;
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	};
	
	if(myWidth < widthLimit){
		document.getElementById('wrapper').className = 'wrapper-width1';
		document.getElementById('colophon').className = 'wrapper-width1';
	} else {
		document.getElementById('wrapper').className = 'wrapper-width2';
		document.getElementById('colophon').className = 'wrapper-width2';
	}
	
}
doResize();