function changecoin() {

	switch (document.forms[0].coinchoice.value) {
	   case "us_quarter":
		  document.images[0].src = "images/us_quarter_front.jpg"
		  break;
	   case "us_penny":
		  document.images[0].src = "images/us_penny_front.jpg"
		  break;
	   case "uk_pound":
		  document.images[0].src = "images/uk_pound_front.jpg"
		  break;
	   case "mad":
		  document.images[0].src = "images/mad_front.gif"
		  break;
	}

}



function flip() {
 var cointype = document.forms[0].coinchoice.value
	flippedstate = Math.floor(Math.random() * 2);

	if (flippedstate == 0) { 
	document.images[0].src = "images/" + cointype + "_front.gif";   
	var questionvalue = document.forms[0].heads.value 
	document.getElementById("headsortails").innerHTML = "<h2>Heads</h2>";
 	document.getElementById("question").innerHTML = "<h3>" + questionvalue + "</h3>" 
	 };
	
	if (flippedstate == 1) { 
	document.images[0].src = "images/" + cointype + "_back.gif"; 
	var questionvalue = document.forms[0].tails.value       
	document.getElementById("headsortails").innerHTML = "<h2>Tails</h2>";
	document.getElementById("question").innerHTML = "<h3>" + questionvalue + "</h3>"
	 } ;
	 
	 
}