複利計算網頁程式碼

woff

看得懂嗎！還真的有些複雜噢！

參考一下就好!!... 共分成二個部份

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1.選取程式碼：javascript放在網頁 部份

1. <script language="javascript">
   
2. 
   
3. 
   
4. 
   
5. function showMenuIndicator()
   
6. 
   
7. {
   
8. 
   
9. if (!document.images) return;
   
10. 
    
11. var i;
    
12. 
    
13. for (i = 0; i < document.images.length; i++)
    
14. 
    
15. {
    
16. 
    
17. if (document.images.name)
    
18. 
    
19.   if (location.href.indexOf("/" + document.images.name + ".") >= 0)
    
20. 
    
21.   document.images.src = "/images/menu/menuindicator.gif";
    
22. 
    
23. }
    
24. 
    
25. }
    
26. 
    
27. function getCtrlVal(ctrl)
    
28. 
    
29. {
    
30. 
    
31. if (ctrl.value != null)
    
32. 
    
33. {
    
34. 
    
35.   return ctrl.value;
    
36. 
    
37. }
    
38. 
    
39. else if (ctrl.selectedIndex != null)
    
40. 
    
41. {
    
42. 
    
43.   if (ctrl.selectedIndex >= 0)
    
44. 
    
45.    return ctrl.options[ctrl.selectedIndex].value;
    
46. 
    
47. }
    
48. 
    
49. else if (ctrl.length != null)
    
50. 
    
51. {
    
52. 
    
53.   var i;
    
54. 
    
55.   for (i = 0; i < ctrl.length; i++)
    
56. 
    
57.   {
    
58. 
    
59.    if (ctrl.checked) return ctrl.value;
    
60. 
    
61.   }
    
62. 
    
63. }
    
64. 
    
65. return null;
    
66. 
    
67. }
    
68. 
    
69. 
    
70. 
    
71. function setCtrlVal(ctrl,val)
    
72. 
    
73. {
    
74. 
    
75. if (ctrl.value != null)
    
76. 
    
77. {
    
78. 
    
79.   ctrl.value = val;
    
80. 
    
81. }
    
82. 
    
83. else if (ctrl.selectedIndex != null)
    
84. 
    
85. {
    
86. 
    
87.   var i;
    
88. 
    
89.   for (i = 0; i < ctrl.length; i++)
    
90. 
    
91.   {
    
92. 
    
93.    if (ctrl.options.value == val)
    
94. 
    
95.    {
    
96. 
    
97.     ctrl.selectedIndex = i;
    
98. 
    
99.     break;
    
100. 
     
101.    }
     
102. 
     
103.   }   
     
104. 
     
105. }
     
106. 
     
107. else if (ctrl.length != null)
     
108. 
     
109. {
     
110. 
     
111.   var i;
     
112. 
     
113.   for (i = 0; i < ctrl.length; i++)
     
114. 
     
115.   {
     
116. 
     
117.    if (ctrl.value == val)
     
118. 
     
119.    {
     
120. 
     
121.     ctrl.checked = true;
     
122. 
     
123.     break;
     
124. 
     
125.    }
     
126. 
     
127.   }
     
128. 
     
129. }
     
130. 
     
131. }
     
132. 
     
133. 
     
134. 
     
135. function getHrefParam(paramName)
     
136. 
     
137. {
     
138. 
     
139. var i = location.href.indexOf("?" + paramName + "=");
     
140. 
     
141. if (i < 0) i = location.href.indexOf("&" + paramName + "=");
     
142. 
     
143. if (i < 0) return null;
     
144. 
     
145. 
     
146. 
     
147. var j = location.href.indexOf("&", i + 1);
     
148. 
     
149. if (j < 0) j = location.href.length;
     
150. 
     
151. return unescape(location.href.substring(i + 2 + paramName.length, j));
     
152. 
     
153. }
     
154. 
     
155. 
     
156. 
     
157. function zeroBlanks(formname)
     
158. 
     
159. {
     
160. 
     
161. var i, ctrl;
     
162. 
     
163. for (i = 0; i < formname.elements.length; i++)
     
164. 
     
165. {
     
166. 
     
167.   ctrl = formname.elements;
     
168. 
     
169.   if (ctrl.type == "text")
     
170. 
     
171.   {
     
172. 
     
173.    if (makeNumeric(ctrl.value) == "")
     
174. 
     
175.     ctrl.value = "0";
     
176. 
     
177.   }
     
178. 
     
179. }
     
180. 
     
181. }
     
182. 
     
183. 
     
184. 
     
185. function filterChars(s, charList)
     
186. 
     
187. {
     
188. 
     
189. var s1 = "" + s; // force s1 to be a string data type
     
190. 
     
191. var i;
     
192. 
     
193. for (i = 0; i < s1.length; )
     
194. 
     
195. {
     
196. 
     
197.   if (charList.indexOf(s1.charAt(i)) < 0)
     
198. 
     
199.    s1 = s1.substring(0,i) + s1.substring(i+1, s1.length);
     
200. 
     
201.   else
     
202. 
     
203.    i++;
     
204. 
     
205. }
     
206. 
     
207. return s1;
     
208. 
     
209. }
     
210. 
     
211. 
     
212. 
     
213. function makeNumeric(s)
     
214. 
     
215. {
     
216. 
     
217. return filterChars(s, "1234567890.-");
     
218. 
     
219. }
     
220. 
     
221. 
     
222. 
     
223. function numval(val,digits,minval,maxval)
     
224. 
     
225. {
     
226. 
     
227. val = makeNumeric(val);
     
228. 
     
229. if (val == "" || isNaN(val)) val = 0;
     
230. 
     
231. val = parseFloat(val);
     
232. 
     
233. if (digits != null)
     
234. 
     
235. {
     
236. 
     
237.   var dec = Math.pow(10,digits);
     
238. 
     
239.   val = (Math.round(val * dec))/dec;
     
240. 
     
241. }
     
242. 
     
243. if (minval != null && val < minval) val = minval;
     
244. 
     
245. if (maxval != null && val > maxval) val = maxval;
     
246. 
     
247. return parseFloat(val);
     
248. 
     
249. }
     
250. 
     
251. 
     
252. 
     
253. function formatNumber(val,digits,minval,maxval)
     
254. 
     
255. {
     
256. 
     
257. var sval = "" + numval(val,digits,minval,maxval);
     
258. 
     
259. var i;
     
260. 
     
261. var iDecpt = sval.indexOf(".");
     
262. 
     
263. if (iDecpt < 0) iDecpt = sval.length;
     
264. 
     
265. if (digits != null && digits > 0)
     
266. 
     
267. {
     
268. 
     
269.   if (iDecpt == sval.length)
     
270. 
     
271.    sval = sval + ".";
     
272. 
     
273.   var places = sval.length - sval.indexOf(".") - 1;
     
274. 
     
275.   for (i = 0; i < digits - places; i++)
     
276. 
     
277.    sval = sval + "0";
     
278. 
     
279. }
     
280. 
     
281. var firstNumchar = 0;
     
282. 
     
283. if (sval.charAt(0) == "-") firstNumchar = 1;
     
284. 
     
285. for (i = iDecpt - 3; i > firstNumchar; i-= 3)
     
286. 
     
287.   sval = sval.substring(0, i) + "," + sval.substring(i);
     
288. 
     
289. 
     
290. 
     
291. return sval;
     
292. 
     
293. }
     
294. 
     
295. 
     
296. 
     
297. function presentValue(fv,r,y)
     
298. 
     
299. {
     
300. 
     
301. return fv/Math.pow(1+r,y);
     
302. 
     
303. }
     
304. 
     
305. 
     
306. 
     
307. function futureValue(p,r,y)
     
308. 
     
309. {
     
310. 
     
311. return p*Math.pow(1+r,y);
     
312. 
     
313. }
     
314. 
     
315. 
     
316. 
     
317. function returnRate(pv,fv,y)
     
318. 
     
319. {
     
320. 
     
321. return Math.pow(fv/pv,1.0/y) - 1.0;
     
322. 
     
323. }
     
324. 
     
325. 
     
326. 
     
327. function geomSeries(z,m,n)
     
328. 
     
329. {
     
330. 
     
331. var amt;
     
332. 
     
333. if (z == 1.0) amt = n + 1;
     
334. 
     
335. else amt = (Math.pow(z,n + 1) - 1)/(z - 1);
     
336. 
     
337. if (m >= 1) amt -= geomSeries(z,0,m-1);
     
338. 
     
339. return amt;
     
340. 
     
341. }
     
342. 
     
343. 
     
344. 
     
345. function basicInvestment(p,r,y,c)
     
346. 
     
347. {
     
348. 
     
349. if (c == null) c = 0;
     
350. 
     
351. 
     
352. 
     
353. return futureValue(p,r,y) + c*geomSeries(1+r,1,y);
     
354. 
     
355. }
     
356. 
     
357. 
     
358. 
     
359. function annuityPayout(p,r,y)
     
360. 
     
361. {
     
362. 
     
363. return futureValue(p,r,y-1)/geomSeries(1+r,0,y-1);
     
364. 
     
365. }
     
366. 
     
367. 
     
368. 
     
369. function mortgagePayment(p,r,y)
     
370. 
     
371. {
     
372. 
     
373. return futureValue(p,r,y)/geomSeries(1+r,0,y-1);
     
374. 
     
375. }
     
376. 
     
377. 
     
378. 
     
379. function randN(m,s)
     
380. 
     
381. {
     
382. 
     
383. return s*Math.sqrt(-2*Math.log(Math.random()))*Math.cos(2*Math.PI*Math.random()) + m;
     
384. 
     
385. }
     
386. 
     
387. 
     
388. 
     
389. function logNmean(m,s)
     
390. 
     
391. {
     
392. 
     
393. return Math.log(m) - (Math.pow(logNsigma(m,s),2)/2);
     
394. 
     
395. }
     
396. 
     
397. 
     
398. 
     
399. function logNsigma(m,s)
     
400. 
     
401. {
     
402. 
     
403. return Math.sqrt(Math.log(Math.pow(s/m,2) + 1));
     
404. 
     
405. }
     
406. 
     
407. 
     
408. 
     
409. function gmEst(r_am,s)
     
410. 
     
411. {
     
412. 
     
413. return Math.sqrt(Math.pow(1 + r_am, 2) - Math.pow(s,2)) - 1;
     
414. 
     
415. }
     
416. 
     
417. 
     
418. 
     
419. function numOrder(n, m)
     
420. 
     
421. {
     
422. 
     
423. return n - m;
     
424. 
     
425. }
     
426. 
     
427. //-->
     
428. 
     
429. 
     
430. 
     
431. 
     
432. 
     
433. </script>

複製代碼

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2.選取程式碼： 部份
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1. <FORM NAME="mainform" ACTION="(script removed)doCalc()" METHOD="OST">
   
2. 
   
3. <CENTER>
   
4. 
   
5. <TABLE BGCOLOR="#f08080" BORDER="0" CELLPADDING="1" CELLSPACING="0"><TR><TD>
   
6. 
   
7. <TABLE WIDTH="500" BORDER="0" CELLSPACING="0" BGCOLOR="#ffa500">
   
8. 
   
9. <TR><TD COLSPAN=2>
   
10. 
    
11. <TABLE WIDTH="100%" BORDER=0 CELLSPACING=0>
    
12. 
    
13. <TR BGCOLOR="#008b8b"><TD ALIGN="center"><FONT COLOR="#FFFFFF"><B>輸入</B></FONT></TD></TR>
    
14. 
    
15. </TABLE>
    
16. 
    
17. </TD>
    
18. 
    
19. </TR>
    
20. 
    
21. <TR><TD width="207">本金:</TD>
    
22. 
    
23. <TD width="289">$ <INPUT TYPE="TEXT" NAME="p" SIZE="10" VALUE="" onChange="value=formatNumber(value,2,0)">
    
24. 
    
25. </TD></TR>
    
26. 
    
27. <TR><TD width="207">利率：</TD>
    
28. 
    
29. <TD width="289">  <INPUT TYPE="TEXT" NAME="r" SIZE="8" VALUE="5" onChange="value=numval(value,null,0)"> %
    
30. 
    
31. </TD></TR>
    
32. 
    
33. <TR><TD width="207">期數：</TD>
    
34. 
    
35. <TD width="289">  <INPUT TYPE="TEXT" NAME="y" SIZE="8" VALUE="1" onChange="value=numval(value,null,0)">
    
36. 
    
37. </TD></TR>
    
38. 
    
39. <TR><TD COLSPAN=2 ALIGN="CENTER"> <BR>
    
40. 
    
41. <INPUT TYPE="BUTTON" VALUE="計算" onClick="doCalc()"></TD></TR>
    
42. 
    
43. <TR><TD COLSPAN=2>
    
44. 
    
45. <TABLE WIDTH="100%" BORDER=0 CELLSPACING=0>
    
46. 
    
47. <TR BGCOLOR="#008b8b"><TD ALIGN="center"><FONT COLOR="#FFFFFF"><B>未來值</B></FONT></TD></TR> </TABLE>
    
48. 
    
49. </TD></TR>
    
50. 
    
51. 
    
52. 
    
53. <TR><TD COLSPAN=2>複利周期: P(1 + r/n)<SUP>Yn</SUP>   n 等於…… </TD></TR>
    
54. 
    
55. 
    
56. 
    
57. <TR><TD width="207">    1(每年)</TD>
    
58. 
    
59. <TD width="289">$ <INPUT TYPE="TEXT" NAME="fv_1" SIZE="10" VALUE="" readonly></TD></TR>
    
60. 
    
61. <TR><TD width="207">   
    
62. 
    
63. <INPUT TYPE="TEXT" NAME="n" SIZE="4" VALUE="4" onChange="value=numval(value,0,1)">(每季)</TD>
    
64. 
    
65. <TD width="289">$ <INPUT TYPE="TEXT" NAME="fv_n" SIZE="10" VALUE="" readonly>
    
66. 
    
67. </TD></TR>
    
68. 
    
69. <TR><TD width="207">    12(每月)</TD>
    
70. 
    
71. <TD width="289">$ <INPUT TYPE="TEXT" NAME="fv_12" SIZE="10" VALUE="" readonly></TD></TR>
    
72. 
    
73. <TR><TD width="207">    365(每日)</TD>
    
74. 
    
75. <TD width="289">$ <INPUT TYPE="TEXT" NAME="fv_365" SIZE="10" VALUE="" readonly></TD></TR>
    
76. 
    
77. 
    
78. 
    
79. <TR><TD width="207">    365 x 24(每小時)</TD>
    
80. 
    
81. <TD width="289">$ <INPUT TYPE="TEXT" NAME="fv_hourly" SIZE="10" VALUE="" readonly></TD></TR>
    
82. 
    
83. <TR><TD COLSPAN=2>持續複利:</TD></TR>
    
84. 
    
85. <TR><TD width="207">    Pe<SUP>Yr</SUP></TD>
    
86. 
    
87. <TD width="289">$ <INPUT TYPE="TEXT" NAME="fv_e" SIZE="10" VALUE="" readonly></TD></TR>
    
88. 
    
89. </TABLE></TD></TR></TABLE></CENTER></FORM>
    
90. 
    
91. <SCRIPT LANGUAGE="JavaScript">
    
92. 
    
93. <!--
    
94. 
    
95. showMenuIndicator();
    
96. 
    
97. 
    
98. 
    
99. function doCalc()
    
100. 
     
101. {
     
102. 
     
103. var p = numval(document.mainform.p.value);
     
104. 
     
105. var r = numval(document.mainform.r.value)/100;
     
106. 
     
107. var y = numval(document.mainform.y.value);
     
108. 
     
109. var n = numval(document.mainform.n.value);
     
110. 
     
111. 
     
112. 
     
113. document.mainform.fv_1.value = formatNumber(futureValue(p, r, y), 2);
     
114. 
     
115. document.mainform.fv_n.value = formatNumber(futureValue(p, r/n, y*n), 2);
     
116. 
     
117. document.mainform.fv_12.value = formatNumber(futureValue(p, r/12, y*12), 2);
     
118. 
     
119. document.mainform.fv_365.value = formatNumber(futureValue(p, r/365, y*365), 2);
     
120. 
     
121. document.mainform.fv_hourly.value = formatNumber(futureValue(p, r/8760, y*8760), 2);
     
122. 
     
123. document.mainform.fv_e.value = formatNumber(p*Math.exp(r*y), 2);
     
124. 
     
125. }
     
126. 
     
127. //-->
     
128. 
     
129. </SCRIPT>

複製代碼

範例： 複利計算參考

http://www.wellsli.com/interest_rate.htm