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JavaScript DHTML/Development/Number Format - История изменений
2026-04-04T20:01:07Z
История изменений этой страницы в вики
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http://wbex.ru/index.php?title=JavaScript_DHTML/Development/Number_Format&diff=1820&oldid=prev
в 10:02, 26 мая 2010
2010-05-26T10:02:39Z
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Admin: 1 версия
2010-05-26T07:19:59Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==A Generic Number-Formatting Routine==<br />
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<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<HTML><br />
<HEAD><br />
<TITLE>Number Formatting</TITLE><br />
<SCRIPT LANGUAGE="JavaScript"><br />
// generic positive number decimal formatting function<br />
function format (expr, decplaces) {<br />
var str = "" + Math.round (eval(expr) * Math.pow(10,decplaces))<br />
while (str.length <= decplaces) {<br />
str = "0" + str<br />
}<br />
var decpoint = str.length - decplaces<br />
return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);<br />
}<br />
function dollarize (expr) {<br />
return "$" + format(expr,2)<br />
}<br />
</SCRIPT><br />
</HEAD><br />
<BODY><br />
<H1>How to Make Money</H1><br />
<FORM><br />
Enter a positive floating-point value or arithmetic expression to be converted to a currency format:<P><br />
<INPUT TYPE="text" NAME="entry" VALUE="1/3"><br />
<INPUT TYPE="button" VALUE="Dollars and Cents" onClick="this.form.result.value=dollarize(this.form.entry.value)"><br />
<INPUT TYPE="text" NAME="result"><br />
</FORM><br />
</BODY><br />
</HTML><br />
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</source><br />
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==Number format Demo==<br />
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<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>DynAPI Examples - Functions</title><br />
<script language="JavaScript" src="./dynapisrc/dynapi.js"></script><br />
<script language="Javascript"><br />
dynapi.library.setPath("./dynapisrc/");<br />
dynapi.library.include("dynapi.library");<br />
dynapi.library.include("dynapi.functions");<br />
dynapi.library.include("dynapi.api");<br />
</script><br />
</head><br />
<body><br />
<font face="arial" size="2"><br />
<script><br />
var doc=document;<br />
f=dynapi.functions;<br />
doc.write("formatNumber: "+f.formatNumber("-5353535.56363","$#,##0.00")+"<br><br>");<br />
</script><br />
</font><br />
</body><br />
</html><br />
<br />
</source><br />
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<A href="http://www.wbex.ru/Code/JavaScriptDownload/dynapi.zip">dynapi.zip( 791 k)</a><br />
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==Number format, round and total==<br />
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<!-- start source code --><br />
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<source lang="html4strict"><br />
<HTML><br />
<HEAD><br />
<SCRIPT LANUAGE="JavaScript1.1"><br />
// returns the amount in the .99 format<br />
function twoPlaces(amount) {<br />
return (amount == Math.floor(amount)) ? amount + ".00" : ((amount*10 == Math.floor(amount*10)) ? amount + "0" : amount);<br />
}<br />
// rounds number to X decimal places, defaults to 2<br />
function round(number,X) {<br />
X = (!X ? 2 : X);<br />
return Math.round(number*Math.pow(10,X))/Math.pow(10,X);<br />
}<br />
function totals(num) {<br />
return twoPlaces(Math.floor((num - 0) * 100) / 100);<br />
}<br />
</SCRIPT><br />
</HEAD><br />
<BODY ><br />
<B> Two Decimal Places </B><br />
<BR><br />
0.00 is <br />
<script LANUAGE="JavaScript1.1"><br />
document.write(twoPlaces(0.00));<br />
</script><br />
<BR><br />
.10 is <br />
<script LANUAGE="JavaScript1.1"><br />
document.write(twoPlaces(.10));<br />
</script><br />
<BR><br />
1 is <br />
<script LANUAGE="JavaScript1.1"><br />
document.write(twoPlaces(1))<br />
</script><br />
<BR><br />
.-530 is <br />
<script LANUAGE="JavaScript1.1"><br />
document.write(twoPlaces(-.530) )<br />
</script><br />
<BR><BR> <br />
51.02 - 3.8 = <br />
<B><br />
<script LANUAGE="JavaScript1.1"><br />
document.write(round(totals(51.02) - totals(3.80) ));<br />
</script><br />
</BODY><br />
</HTML><br />
<br />
</source></div>
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