function roll(img_name, img_src) {
   	document[img_name].src = img_src;
}

function init() {
	ieHack();
	setCalendar();	
}

function ieHack() {
	if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
		document['calendar'].width = 440;	
	}
}

function setCalendar() {
	today = new Date();
	
	var myDays=["sunday","monday","tuesday","wednesday","thursday","friday","saturday","sunday"];
	
	var newImage = "images/calendar-" + myDays[today.getDay()] + ".jpg";
	
	roll('calendar', newImage);
}