var imgs = new Array();
var numImages = 6;

for(var i=0; i<numImages; i++) {
	imgs[i] = new Array();
	imgs[i][0] = new Image();
	imgs[i][1] = new Image();
	imgs[i][2] = new Image();
	imgs[i][3] = new Image();
	imgs[i][4] = new Image();
	imgs[i][5] = new Image();
}

imgs[0][0].src = "i/mi_home.gif";
imgs[0][1].src = "i/mi_home_on.gif";
imgs[1][0].src = "i/mi_producten.gif";
imgs[1][1].src = "i/mi_producten_on.gif";
imgs[2][0].src = "i/mi_contact.gif";
imgs[2][1].src = "i/mi_contact_on.gif";
imgs[3][0].src = "i/mi_herbespanning.gif";
imgs[3][1].src = "i/mi_herbespanning_on.gif";
imgs[4][0].src = "i/mi_filterzakken.gif";
imgs[4][1].src = "i/mi_filterzakken_on.gif";
imgs[5][0].src = "i/mi_filterkaarsen.gif";
imgs[5][1].src = "i/mi_filterkaarsen_on.gif";

function ro(obj) {
	var oid = parseInt(obj.id);
	
	if(imgs[oid][0].src == obj.src) {
		obj.src = imgs[oid][1].src;
	} else {
		obj.src = imgs[oid][0].src;
	}
}