IG0=new Image();IG0.src="images/main/btn1_01.jpg"
IG1=new Image();IG1.src="images/main/btn2_01.jpg"
IG2=new Image();IG2.src="images/main/btn1_02.jpg"
IG3=new Image();IG3.src="images/main/btn2_02.jpg"
IG4=new Image();IG4.src="images/main/btn1_03.jpg"
IG5=new Image();IG5.src="images/main/btn2_03.jpg"
IG6=new Image();IG6.src="images/main/btn1_04.jpg"
IG7=new Image();IG7.src="images/main/btn2_04.jpg"
IG8=new Image();IG8.src="images/main/btn1_05.jpg"
IG9=new Image();IG9.src="images/main/btn2_05.jpg"
IG10=new Image();IG10.src="images/main/btn1_06.jpg"
IG11=new Image();IG11.src="images/main/btn2_06.jpg"
function mon(n,x){
 document.images["IM"+n].src=x;
}