var modeSel = document.getElementById('comic-panel').getElementsByTagName('select')[0];
var comicIMGs = document.getElementById('comic-container').getElementsByTagName('img');
modeSel.onchange = function(e){
    switch(this.value){
	case 'normal':
	for(var i=0;i< comicIMGs.length;i++){
	    comicIMGs[i].style.width='auto';
	}
	break;
	case 'fitX':
	for(var i=0;i< comicIMGs.length;i++){
	    comicIMGs[i].style.width='978px';
	}

	break;
    }
}