function calc(ch) {
		pix = parseInt(document.form1.pictx.value)
		piy = parseInt(document.form1.picty.value);		
		papx = parseInt(document.form1.paperx.value);		
		papy = parseInt(document.form1.papery.value);		
		hamilr= parseInt(document.form1.hamilr.value);
		hamiup= parseInt(document.form1.hamiup.value);
		document.form1.pictyy.value =Math.ceil((papy/papx)*(pix-hamilr)+hamiup);
		piyy = parseInt(document.form1.pictyy.value)
	 if(ch == "p89"){
	 	document.form1.paperx.value = 89, document.form1.papery.value = 127;
		 }
	 if(ch == "p100"){
	 	document.form1.paperx.value = 100, document.form1.papery.value = 148;
		 }
	 if(ch == "p127"){
	 	document.form1.paperx.value = 127, document.form1.papery.value = 178;
		 }
	 if(ch == "p210"){
	 	document.form1.paperx.value = 210, document.form1.papery.value = 297;
		 }
	 if(ch == "f2048"){
	 	document.form1.pictx.value = 2048, document.form1.picty.value = 1536;
		 }
	 if(ch == "f1536"){
	 	document.form1.pictx.value = 1536, document.form1.picty.value = 2048;
		 }
	 if(ch == "f1600"){
	 	document.form1.pictx.value = 1600, document.form1.picty.value = 1200;
		 }
	 if(ch == "f1200"){
	 	document.form1.pictx.value = 1200, document.form1.picty.value = 1600;
		 }
	 if(ch == "f1024"){
	 	document.form1.pictx.value = 1024, document.form1.picty.value = 768;
		 }
	 if(ch == "f768"){
	 	document.form1.pictx.value = 768, document.form1.picty.value = 1024;
		 }
	 if(ch == "f1000"){
	 	document.form1.pictx.value = 1000, document.form1.picty.value = 1480;
		 }
	 if(ch == "h0"){
	 	document.form1.hamilr.value =0, document.form1.hamiup.value = 0;
		 }
	 if(ch == "h1"){
	 	document.form1.hamilr.value = Math.floor(document.form1.pictx.value/100);
		document.form1.hamiup.value = Math.floor(document.form1.picty.value/200);
		 }
	else {
		if(ch=="run"){
		uph=3;
		lrh=2.5;
		spe=0;
		speup=0;
		spel=0;
		ex = (papy+8)/ papy;
		}else if (ch=="quicker"){
		uph=5;
		lrh=5;
		spe=0;
		speup=0;
		spel=0;
		ex =(papx+10)/papx;
		}else if (ch=="special"){
		uph=2;
		lrh=2.5;
		spe=1;
		speup=3-uph;
		spel=0.5;
		ex =(papy+8)/papy;
		}
		yy = Math.min(piy,piyy)
		document.form1.resscreen.value =
			Math.floor((pix-hamilr) / ((papx/ 25.4) * (1/ex)));
		document.form1.respaper.value =
			Math.floor(document.form1.resscreen.value*(1/ex)*100)/100;
		document.form1.widthscreen.value =
			 Math.floor(pix*25.4/document.form1.resscreen.value*100)/100 ;
		document.form1.widthprint.value =
			Math.round(pix*25.4/(document.form1.resscreen.value*(1/ex))*100)/100 ;
		document.form1.widthhami.value =
			Math.round((pix*25.4/(document.form1.resscreen.value*(1/ex))-papx)*100)/100 ;
		document.form1.width.value =
			Math.floor((2*lrh+papx)/25.4*document.form1.resscreen.value*(1/ex)) ;
		document.form1.height.value =
			Math.floor((uph+(5+spe*speup)+papy)/25.4*document.form1.resscreen.value*(1/ex)) ;
		document.form1.whiteup.value =
			Math.floor((uph/25.4*document.form1.resscreen.value*(1/ex)-hamiup));
		document.form1.downhami.value =
			Math.round(((5+spe*speup)-(papy+(5+spe*speup)-(yy-hamiup)*25.4/(document.form1.resscreen.value*(1/ex))))*100)/100;
		document.form1.whitedown.value =
			Math.ceil((papy+(5+spe*speup))*(document.form1.resscreen.value*(1/ex))/25.4-(yy-hamiup));
		document.form1.nonwhitedown.value =
			yy+ Math.floor((uph/25.4*document.form1.resscreen.value*(1/ex)-hamiup));
		document.form1.uphami.value =
			Math.round((uph- 25.4*document.form1.whiteup.value/(document.form1.resscreen.value*(1/ex)))*100)/100;
		document.form1.whitel.value =
			Math.ceil((document.form1.width.value-document.form1.pictx.value)/2
			-spe*document.form1.resscreen.value*spel/25.4);
		document.form1.whiter.value =
			Math.floor((document.form1.width.value-document.form1.pictx.value)/2
			+spe*document.form1.resscreen.value*spel/25.4);

	}

	}