function tank_volume(f) { var dia=f.diameter_zip.value; var len=f.length_zip.value; var volume=dia*dia*3.141592/4*len/12/12/12*7.48; f.result.value=Math.round(volume) + " gal"; };// end tank volume function cyl_chart(f) { chartWindow=window.open('','','toolbar=yes,scrollbars=yes,width=600,height=420'); cyl_Writer(f); };// end cyl_chart function cyl_Writer(f) { chartWindow.document.open("text/html","replace"); var tankname=(f.tankname.value); var contents=(f.contents.value); var dia=(f.diameter_zip.value); var len=(f.length_zip.value); var volume=Math.floor(dia*dia*3.141592/4*len/12/12/12*7.48); write_header(tankname,contents, volume + ' Gallon Tank', (f.diameter_zip.value) + '" Diameter x ' + (f.length_zip.value) + '" Long'); for(var depth=1; depth <= f.diameter_zip.value; depth++){ var area=segment_area(depth, f.diameter_zip.value) var vol=area*f.length_zip.value/12/12/12*7.48 write_row((depth),(Math.round(vol))) } chartWindow.document.write('') chartWindow.document.write('©2008 PSI Farming, Inc.') chartWindow.document.close() };// end cyl_Writer function write_header(tankname,contents,tank_diameter,tank_length){ chartWindow.document.write(''+ 'Dipstick Chart') chartWindow.document.write('') chartWindow.document.write('') chartWindow.document.write(""+ '') chartWindow.document.write(''+ '') };// end write_header function write_row(depth, vol){ chartWindow.document.write('') write_cell(depth) write_cell(vol) chartWindow.document.write('') };// end write_row function write_cell(string){ chartWindow.document.write('') };// end write_cell function segment_area(depth, dia) { radius=dia/2 temp=radius-depth chordl=2*Math.sqrt(2 * depth * radius-depth * depth) ang=Math.acos(temp/radius)*2 arcl=ang*radius return ((arcl*radius-chordl*temp)/2) };// end segment_area
'+ '

' + tankname + '

'+ '

Contents:  ' + contents + '

'+ '

' + tank_diameter + '
'+ tank_length + '

'+ '
Depth (inches)Volume (gallons)
' + string + '