// pre load images
var strBodyImages = new Array();
var strBodyImagesOn = new Array();
var i = 0;

for (i = 1; i <= 4; i ++) {
	strBodyImages[i] = new Image();
	strBodyImagesOn[i] = new Image();	
	strBodyImages[i].src = "images/bodyImg" + i + ".gif";
	strBodyImagesOn[i].src = "images/bodyImg" + i + "_on.gif";
}

function swapImage(el,state,ind) {
	var obj = document.getElementById(el);
	
	if (state == "on") {
		obj.src = strBodyImagesOn[ind].src;
	} else {
		obj.src = strBodyImages[ind].src;
	}
}