function weightcalc() {
	var pladan;
	var veneer;

	var width  = document.weight.w_width.value/1000;
	var length = document.weight.w_length.value/1000;
	var density = document.weight.ch2.value;
	var thick;
	if(document.weight.ch2.value==167){thick=1.5;}
	if(document.weight.ch2.value==150){thick=2;}
	if(document.weight.ch2.value==120){thick=2.5;}
	if(document.weight.ch2.value==133){thick=3;}
	if(document.weight.ch2.value==150){thick=4;}
	if(document.weight.ch2.value==160){thick=5;}
	if(document.weight.ch2.value==267){thick=6;}
	if(document.weight.ch2.value==243){thick=7;}
	if(document.weight.ch2.value==200){thick=9;}
	if(document.weight.ch2.value==208){thick=12;}
	if(document.weight.ch2.value==220){thick=15;}
	thick=thick/1000;

	pladan=width*length*thick*density;
	veneer=width*length*thick*604;

	pladan=pladan*100; 	pladan=Math.round(pladan); pladan=pladan/100;
	veneer=veneer*100; 	veneer=Math.round(veneer); veneer=veneer/100;
	
	document.weight.result.value  = pladan;
	document.weight.result2.value = veneer;
}