var no_of_button = 7;		
	var images = new Array(no_of_button*2);
	var preUrl = "";
	
	for(var i=0; i<(no_of_button*2); i++ ){
		images[i] = new Image();
	}
	
	function change(but,num){
		but.src = images[num].src;
	}		
	
	if(levelOne){
		preUrl = "../";
	}
	
	images[0].src = preUrl+"images/link_1x1.gif";
	images[1].src = preUrl+"images/link_over_1x1.gif";		
	images[2].src = preUrl+"images/link_1x3.gif";
	images[3].src = preUrl+"images/link_over_1x3.gif";		
	images[4].src = preUrl+"images/link_1x5.gif";
	images[5].src = preUrl+"images/link_over_1x5.gif";		
	images[6].src = preUrl+"images/link_1x7.gif";
	images[7].src = preUrl+"images/link_over_1x7.gif";		
	images[8].src = preUrl+"images/link_1x9.gif";		
	images[9].src = preUrl+"images/link_over_1x9.gif";
	images[10].src = preUrl+"images/link_1x11.gif";		
	images[11].src = preUrl+"images/link_over_1x11.gif";
	images[12].src = preUrl+"images/link_1x13.gif";		
	images[13].src = preUrl+"images/link_over_1x13.gif";
		

	function changeImage(o,n){
		o.src = images[n].src;
	}