var menuitems='candidates clients about links contact'.split(' ');
var menuitem=new Array(menuitems.length);

function Menuitem(name){
	this.off=new Image();
	this.on=new Image();
	this.off.src='images/menu/'+name+'_mn.gif';
	this.on.src='images/menu/'+name+'_hv.gif';
}

for(var i=0; i<menuitems.length; i++) menuitem[menuitems[i]]=new Menuitem(menuitems[i]);

function rollOn(name){ document[name].src=menuitem[name].on.src; }
function rollOff(name){ document[name].src=menuitem[name].off.src; }