var subst_21 = new Image (30, 30);
var subst_22 = new Image (30, 30);
var subst_23 = new Image (30, 30);
var subst_24 = new Image (30, 30);
var subst_25 = new Image (30, 30);
var subst_26 = new Image (30, 30);
var subst_27 = new Image (30, 30);
var subst_28 = new Image (30, 30);
var subst_29 = new Image (30, 30);
var subst_30 = new Image (30, 30);
var subst_31 = new Image (30, 30);
var subst_32 = new Image (30, 30);
var subst_33 = new Image (30, 30);
var subst_34 = new Image (30, 30);
var subst_35 = new Image (30, 30);
var subst_36 = new Image (30, 30);
var subst_37 = new Image (30, 30);
var subst_38 = new Image (30, 30);
var subst_39 = new Image (30, 30);
var subst_40 = new Image (30, 30);



var orig_21  = new Image (30, 30);
var orig_22  = new Image (30, 30);
var orig_23  = new Image (30, 30);
var orig_24  = new Image (30, 30);
var orig_25  = new Image (30, 30);
var orig_26  = new Image (30, 30);
var orig_27  = new Image (30, 30);
var orig_28  = new Image (30, 30);
var orig_29  = new Image (30, 30);
var orig_30  = new Image (30, 30);
var orig_31  = new Image (30, 30);
var orig_32  = new Image (30, 30);
var orig_33  = new Image (30, 30);
var orig_34  = new Image (30, 30);
var orig_35  = new Image (30, 30);
var orig_36  = new Image (30, 30);
var orig_37  = new Image (30, 30);
var orig_38  = new Image (30, 30);
var orig_39  = new Image (30, 30);
var orig_40  = new Image (30, 30);




subst_21.src = "b-anti.gif";
subst_22.src = "b-anti.gif";
subst_23.src = "b-anti.gif";
subst_24.src = "b-anti.gif";
subst_25.src = "b-anti.gif";
subst_26.src = "b-anti.gif";
subst_27.src = "b-anti.gif";
subst_28.src = "b-anti.gif";
subst_29.src = "b-anti.gif";
subst_30.src = "b-anti.gif";
subst_31.src = "b-anti.gif";
subst_32.src = "b-anti.gif";
subst_33.src = "b-anti.gif";
subst_34.src = "b-anti.gif";
subst_35.src = "b-anti.gif";
subst_36.src = "b-anti.gif";
subst_37.src = "b-anti.gif";
subst_38.src = "b-anti.gif";
subst_39.src = "b-anti.gif";
subst_40.src = "b-anti.gif";




orig_21.src  = "b-norm.gif";
orig_22.src  = "b-norm.gif";
orig_23.src  = "b-norm.gif";
orig_24.src  = "b-norm.gif";
orig_25.src  = "b-norm.gif";
orig_26.src  = "b-norm.gif";
orig_27.src  = "b-norm.gif";
orig_28.src  = "b-norm.gif";
orig_29.src  = "b-norm.gif";
orig_30.src  = "b-norm.gif";
orig_31.src  = "b-norm.gif";
orig_32.src  = "b-norm.gif";
orig_33.src  = "b-norm.gif";
orig_34.src  = "b-norm.gif";
orig_35.src  = "b-norm.gif";
orig_36.src  = "b-norm.gif";
orig_37.src  = "b-norm.gif";
orig_38.src  = "b-norm.gif";
orig_39.src  = "b-norm.gif";
orig_40.src  = "b-norm.gif";



function can (numero)		
			{
			if (numero==21) document.images ["simbol-21"].src = subst_21.src;
			if (numero==22) document.images ["simbol-22"].src = subst_22.src;
			if (numero==23) document.images ["simbol-23"].src = subst_23.src;
			if (numero==24) document.images ["simbol-24"].src = subst_24.src;
			if (numero==25) document.images ["simbol-25"].src = subst_25.src;
			if (numero==26) document.images ["simbol-26"].src = subst_26.src;
			if (numero==27) document.images ["simbol-27"].src = subst_27.src;
			if (numero==28) document.images ["simbol-28"].src = subst_28.src;
			if (numero==29) document.images ["simbol-29"].src = subst_29.src;
			if (numero==30) document.images ["simbol-30"].src = subst_30.src;
			if (numero==31) document.images ["simbol-31"].src = subst_31.src;
			if (numero==32) document.images ["simbol-32"].src = subst_32.src;
			if (numero==33) document.images ["simbol-33"].src = subst_33.src;
			if (numero==34) document.images ["simbol-34"].src = subst_34.src;
			if (numero==35) document.images ["simbol-35"].src = subst_35.src;
			if (numero==36) document.images ["simbol-36"].src = subst_36.src;
			if (numero==37) document.images ["simbol-37"].src = subst_37.src;
			if (numero==38) document.images ["simbol-38"].src = subst_38.src;
			if (numero==39) document.images ["simbol-39"].src = subst_39.src;
			if (numero==40) document.images ["simbol-40"].src = subst_40.src;

			}

function ren (numero)
			{
			if (numero==21) document.images ["simbol-21"].src=orig_21.src;
			if (numero==22) document.images ["simbol-22"].src=orig_22.src;
    		if (numero==23) document.images ["simbol-23"].src=orig_23.src;
			if (numero==24) document.images ["simbol-24"].src=orig_24.src;
			if (numero==25) document.images ["simbol-25"].src=orig_25.src;
			if (numero==26) document.images ["simbol-26"].src=orig_26.src;
			if (numero==27) document.images ["simbol-27"].src=orig_27.src;
			if (numero==28) document.images ["simbol-28"].src=orig_28.src;
			if (numero==29) document.images ["simbol-29"].src=orig_29.src;
			if (numero==30) document.images ["simbol-30"].src=orig_30.src;
			if (numero==31) document.images ["simbol-31"].src=orig_31.src;
			if (numero==32) document.images ["simbol-32"].src=orig_32.src;
			if (numero==33) document.images ["simbol-33"].src=orig_33.src;
			if (numero==34) document.images ["simbol-34"].src=orig_34.src;
			if (numero==35) document.images ["simbol-35"].src=orig_35.src;
			if (numero==36) document.images ["simbol-36"].src=orig_36.src;
			if (numero==37) document.images ["simbol-37"].src=orig_37.src;
			if (numero==38) document.images ["simbol-38"].src=orig_38.src;
			if (numero==39) document.images ["simbol-39"].src=orig_39.src;
			if (numero==40) document.images ["simbol-40"].src=orig_40.src;
			}