if (document.images) {

	var instr = new Image();
	instr.src = "/graphics/linkI.gif";
	var man = new Image();
	man.src = "/graphics/linkM.gif";
	var serv = new Image();
	serv.src = "/graphics/linkSe.gif";
	var sur = new Image();
	sur.src = "/graphics/linkSu.gif";
	var cont = new Image();
	cont.src = "/graphics/linkC.gif";
	
	var instrov = new Image();
	instrov.src = "/graphics/linkIL.gif";
	var manov = new Image();
	manov.src = "/graphics/linkML.gif";
	var servov = new Image();
	servov.src = "/graphics/linkSeL.gif";
	var surov = new Image();
	surov.src = "/graphics/linkSuL.gif";
	var contov = new Image();
	contov.src = "/graphics/linkCL.gif";
	
}

function rollov (pic) {

	document.images[pic].src = eval(pic + "ov.src");
}

function rollot (pic) {

	document.images[pic].src = eval(pic + ".src");

}