var imgMOF=new Array();
var imgMON=new Array();

imgMOF[1]=new Image();imgMOF[1].src="images/m11.gif";
imgMON[1]=new Image();imgMON[1].src="images/m51.gif";
imgMOF[2]=new Image();imgMOF[2].src="images/m12.gif";
imgMON[2]=new Image();imgMON[2].src="images/m52.gif";
imgMOF[3]=new Image();imgMOF[3].src="images/m13.gif";
imgMON[3]=new Image();imgMON[3].src="images/m53.gif";
imgMOF[4]=new Image();imgMOF[4].src="images/m20.gif";
imgMON[4]=new Image();imgMON[4].src="images/m40.gif";
imgMOF[5]=new Image();imgMOF[5].src="images/m21.gif";
imgMON[5]=new Image();imgMON[5].src="images/m41.gif";
imgMOF[6]=new Image();imgMOF[6].src="images/m22.gif";
imgMON[6]=new Image();imgMON[6].src="images/m42.gif";
imgMOF[7]=new Image();imgMOF[7].src="images/m23.gif";
imgMON[7]=new Image();imgMON[7].src="images/m43.gif";

function MOF(imgNo){
document.images["ch"+imgNo].src=imgMOF[imgNo].src;
}

function MON(imgNo){
document.images["ch"+imgNo].src=imgMON[imgNo].src;
}