// JavaScript Document


var testno=1;
var total=5;
function changetest(x)
{
	if(x=="next")
	{
		if(testno!=total)
		{
			document.getElementById("testi"+testno).style.display="none";
			testno=testno+1;
			document.getElementById("testi"+testno).style.display="block";
				
			if(testno==2)
			{
				document.getElementById("arrow_left").src="images/but_left.gif";
			}
			if(testno==total)
			{
				document.getElementById("arrow_right").src="images/but_right1.gif";
			}
		}
	}
	
	
	if(x=="prev")
	{
		if(testno!=1)
		{
			document.getElementById("testi"+testno).style.display="none";
			testno=testno-1;
			document.getElementById("testi"+testno).style.display="block";
				
			if(testno==1)
			{
				document.getElementById("arrow_left").src="images/but_left1.gif";
			}
			if(testno==total-1)
			{
				document.getElementById("arrow_right").src="images/but_right.gif";
			}
			
		}
	}
}