image1 = "im/right_arrow.jpg"; 
image2 = "im/down_arrow.jpg"; 

function swap(c_img)
{ 
	if(c_img.src.indexOf(image1) != -1)
	{
		c_img.src = image2;
	}
	else
	{
		c_img.src = image1;
	}
}

function unhide(divID)
{
	var item = document.getElementById(divID);
	if(item)
	{
		item.className = (item.className == 'hidden') ? 'unhidden' : 'hidden';
	}
}

intImage1 = 2;
intImage2 = 2;
intImage3 = 2;
intImage4 = 2;

function swapImage1(n)
{
	switch(intImage1)
	{
		case 1:
			n.src = "im/right_arrow.jpg"
			intImage1 = 2
			return(false);
		case 2:
			n.src = "im/down_arrow.jpg"
			intImage1 = 1
			return(false);
	}
}

/* <img id="IMG1" name="IMG1" src="im/right_arrow.jpg" onclick="swapImage1(IMG1);" /> */

function swapImage2(n)
{
	switch(intImage2)
	{
		case 1:
			n.src = "im/right_arrow.jpg"
			intImage2 = 2
			return(false);
		case 2:
			n.src = "im/down_arrow.jpg"
			intImage2 = 1
			return(false);
	}
}

function swapImage3(n)
{
	switch(intImage3)
	{
		case 1:
			n.src = "im/right_arrow.jpg"
			intImage3 = 2
			return(false);
		case 2:
			n.src = "im/down_arrow.jpg"
			intImage3 = 1
			return(false);
	}
}

function swapImage4(n)
{
	switch(intImage4)
	{
		case 1:
			n.src = "im/right_arrow.jpg"
			intImage4 = 2
			return(false);
		case 2:
			n.src = "im/down_arrow.jpg"
			intImage4 = 1
			return(false);
	}
}