bn1s=new Image(30,30);
		bn1s.src="imgs/button_login01.gif";
		bn2s=new Image(30,30);
		bn2s.src="imgs/button_pw01.gif";
		bn3s=new Image(30,30);
		bn3s.src="imgs/button_relog01.gif";
		bn4s=new Image(30,30);
		bn4s.src="imgs/button_main01.gif";
		bn5s=new Image(30,30);
		bn5s.src="imgs/button_enter01.gif";
		
		
		
		bn1n=new Image(30,30);
		bn1n.src="imgs/button_login1.gif";
		bn2n=new Image(30,30);
		bn2n.src="imgs/button_pw1.gif";
		bn3n=new Image(30,30);
		bn3n.src="imgs/button_relog1.gif";
		bn4n=new Image(30,30);
		bn4n.src="imgs/button_main1.gif";
		bn5n=new Image(30,30);
		bn5n.src="imgs/button_enter1.gif";
		
		
		
		
		
		
		
		function img_act(imgName) {
		document[imgName].src=eval(imgName+"s.src");
		}
		function img_inact(imgName) {
		document[imgName].src=eval(imgName+"n.src");
		}