function preLoadimgs() {
	 	a1=new Image; a1.src="images/mmm2_01.gif";
		a2=new Image; a2.src="images/mmm2_02.gif";
		a3=new Image; a3.src="images/mmm2_03.gif";
		a4=new Image; a4.src="images/mmm2_04.gif";
		a5=new Image; a5.src="images/mmm2_05.gif";
		a6=new Image; a6.src="images/mmm2_06.gif";
		a7=new Image; a7.src="images/mmm2_07.gif";
		a8=new Image; a8.src="images/mmm3_01.gif";
		a9=new Image; a9.src="images/mmm3_02.gif";
		a10=new Image; a10.src="images/mmm3_03.gif";
		a11=new Image; a11.src="images/mmm3_04.gif";
		a12=new Image; a12.src="images/mmm3_05.gif";
		a13=new Image; a13.src="images/mmm3_06.gif";
		a14=new Image; a14.src="images/mmm3_07.gif";
		a15=new Image; a15.src="images/mmm21_01.gif";
		a16=new Image; a16.src="images/mmm21_02.gif";
		a17=new Image; a17.src="images/mmm21_03.gif";
		a18=new Image; a18.src="images/mmm21_04.gif";
		a19=new Image; a19.src="images/mmm21_05.gif";
		a20=new Image; a20.src="images/mmm21_06.gif";
		a21=new Image; a21.src="images/mmm21_07.gif";
		a22=new Image; a22.src="images/mmm31_01.gif";
		a23=new Image; a23.src="images/mmm31_02.gif";
		a24=new Image; a24.src="images/mmm31_03.gif";
		a25=new Image; a25.src="images/mmm31_04.gif";
		a26=new Image; a26.src="images/mmm31_05.gif";
		a27=new Image; a27.src="images/mmm31_06.gif";
		a28=new Image; a28.src="images/mmm31_07.gif";
	 }