IG0=new Image();IG0.src="images/head/menu1_1.gif"
IG1=new Image();IG1.src="images/head/menu1_2.gif"
IG2=new Image();IG2.src="images/head/menu2_1.gif"
IG3=new Image();IG3.src="images/head/menu2_2.gif"
IG4=new Image();IG4.src="images/head/menu3_1.gif"
IG5=new Image();IG5.src="images/head/menu3_2.gif"
IG6=new Image();IG6.src="images/head/menu4_1.gif"
IG7=new Image();IG7.src="images/head/menu4_2.gif"
IG8=new Image();IG8.src="images/head/menu5_1.gif"
IG9=new Image();IG9.src="images/head/menu5_2.gif"
function mon(n,x){
 document.images["IM"+n].src=x;
}