var navOver=new Array("help","contact","myHm","search","buy");
var navOvers=new Array();
function init() {
	for(i=0;i<5;i++){
		navOvers[navOver[i]]=new Image();
		navOvers[navOver[i]].src="/images/"+navOver[i]+"Over.gif";
	}
}


function tab(a,b) {
	if(navOvers[a]){
	if(b){
		 document.images["nav_"+a].src = navOvers[a].src;
	}else{
		document.images["nav_"+a].src = "/images/"+a+".gif";
	}
	}
}