上網查詢了一下 沒有簡單的方法所以自己經過1個小時的努力寫出來了 郁悶

function _format(pattern,num,z){

var j =pattern.length >= num.length ? pattern.length : num.length ;

var p = pattern.split("");

var n = num.split("");

var bool = true,nn = "";

for(var i=0;i

var x = n[n.length-j+i];

var y = p[p.length-j+i];

if( z == 0){

if(bool){

if( ( x && y && (x != "0" || y == "0")) || ( x && x != "0" && !y ) || ( y && y == "0" && !x ) ){

nn += x ? x : "0";

bool = false;

}

} else {

nn += x ? x : "0" ;

}

} else {

if( y && ( y == "0" || ( y == "#" && x ) ))

nn += x ? x : "0" ;

}

}

return nn;

}

function _formatNumber(numChar,pattern){

var patterns = pattern.split(".");

varnumChars = numChar.split(".");

var z = patterns[0].indexOf(",") == -1 ? -1 : patterns[0].length - patterns[0].indexOf(",") ;

var num1 = _format(patterns[0].replace(","),numChars[0],0);

var num2 = _format(patterns[1]?patterns[1].split('').reverse().join(''):"", numChars[1]?numChars[1].split('').reverse().join(''):"",1);

num1 =num1.split("").reverse().join('');

var reCat = eval("/[0-9]{" + (z-1) + "," + (z-1) + "}/gi");

var arrdata = z > -1 ? num1.match(reCat) : undefined ;

if( arrdata && arrdata.length > 0 ){

var w =num1.replace(arrdata.join(''),'');

num1 = arrdata.join(',') + ( w == "" ? "" : "," ) + w ;

}

num1 = num1.split("").reverse().join("");

return (num1 == "" ? "0" : num1) + (num2 != "" ? "." + num2.split("").reverse().join('') : "" );

}

function formatNumber(num,opt){

var reCat = /[0#,.]{1,}/gi;

var zeroExc = opt.zeroExc == undefined ? true : opt.zeroExc ;

var pattern = opt.pattern.match(reCat)[0];

var numChar = num.toString();

return !(zeroExc && numChar == 0) ? opt.pattern.replace(pattern,_formatNumber(numChar,pattern)) : opt.pattern.replace(pattern,"0");

}

下邊是測試

var n = 1234567890000;

var p = "######.00";

var x = formatNumber(n,{pattern:p});

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.01;

var p = "#";

var x = formatNumber(n,{pattern:p});

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

n = 1234567890000;

p = "######.##";

x = formatNumber(n,{pattern:p});

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.00;

p = "######.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.00;

p = "######.00";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.01;

p = "######.00";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.01;

p = "######.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.00;

p = "###,###.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.01;

p = "###,###.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.00;

p = "##,####.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.01;

p = "$###,###.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 1234567890000.01;

p = "###,###.##元";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 0.01123123;

p = "$###,###.##";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 0.3123213;

p = "$###,###.00";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 0;

p = "###,###.00元";

x = formatNumber(n,{pattern:p})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n");

var n = 0;

p = "###,###.00元";

x = formatNumber(n,{pattern:p,zeroExc:false})

alert("n = " + n + "\n" + "p = " + p + "\n" + "x = " + x + "\n" + "zeroExc = " + false + "\n");

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2010-07-05 06:12

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