Excel公式爲Javascript，工作，但不一致

遇到問題得到一致的結果，希望能爲一些指針試圖解決這個自己撞牆Excel公式爲Javascript，工作，但不一致

Excel公式：

=IF(C15=""," ",IF(D15="O"(((ROUNDUP(((C15+0.625)/(6.25-0.5)),0)*6.25))+4.125+0.5),IF(D15="t",C15,"ERROR")))

C15= 100.00邏輯測試..

D15="O"第二次邏輯測試，驗證100.00可以擴展到該數字的預定結果... if D15="t"因爲被困住了，它停留在100.00 .... 我可以用「如果其他」後來，還在學習

 <html> 
     <head> 
     <title>Excel Formula to JavaScript</title> 
     </head> 
     <body> 
     <script type="text/javascript"> 

     var num1 = 170.00; 
     var acc1 = (num1 + 0.625)/(6.25-0.50); 
     var acc2 = Math.round((acc1 * 10)/10) * 6.25 + (4.125 + 0.50); 
     document.write(acc2).toFixed(3); 

     </script> 

     <div> 
     <br> 
     num1= 30.00 result should be 42.125".... incorrect result! 
     <br> 
     <br> 
     num1= 40.00 result should be 54.625".... incorrect result! 
     <br> 
     <br> 
     num1= 57.00 result should be 73.365".... incorrect result! 
     <br> 
     <br> 
     num1= 85.00 result should be 98.375"... result correct 
     <br> 
     <br> 
     when num1= 100.00 result should be 117.125"... result correct 
     <br> 
     <br> 
     seems any input under 77 result will be incorrect 
     </div> 
     </body> 
     </html>

來源

2013-10-18 bigdog