一个格式化数值的函数

简单模拟了一点XSL里的formatNumber()方法

一些说明：
“,” (半角的豆号) 如果有的话，看豆号到小数点（如果有的话）前有几位，则按几位划分整数部分
“0”（数字零） 如果该位上没有数字，就补0
“#”（井号） 如果该位上有数字就输出数字，没有则不输出

格式化数值的函数
<script><BR> function formatNumber(number,pattern)<BR> {<BR> var str = number.toString();<BR> var strInt;<BR> var strFloat;<BR> var formatInt;<BR> var formatFloat;<BR> if(/\./g.test(pattern))<BR> {<BR> formatInt = pattern.split('.')[0];<BR> formatFloat = pattern.split('.')[1];<BR> }<BR> else<BR> {<BR> formatInt = pattern;<BR> formatFloat = null;<BR> }<BR> <BR> if(/\./g.test(str))<BR> {<BR> if(formatFloat!=null)<BR> {<BR> var tempFloat = Math.round(parseFloat('0.'+str.split('.')[1])*Math.pow(10,formatFloat.length))/Math.pow(10,formatFloat.length);<BR> strInt = (Math.floor(number)+Math.floor(tempFloat)).toString(); <BR> strFloat = /\./g.test(tempFloat.toString())?tempFloat.toString().split('.')[1]:'0'; <BR> }<BR> else<BR> {<BR> strInt = Math.round(number).toString();<BR> strFloat = '0';<BR> }<BR> }<BR> else<BR> {<BR> strInt = str;<BR> strFloat = '0';<BR> }<BR> if(formatInt!=null)<BR> {<BR> var outputInt = '';<BR> var zero = formatInt.match(/0*$/)[0].length;<BR> var comma = null;<BR> if(/,/g.test(formatInt))<BR> {<BR> comma = formatInt.match(/,[^,]*/)[0].length-1;<BR> }<BR> var newReg = new RegExp('(\\d{'+comma+'})','g');<BR> <BR> if(strInt.length<zero)<BR> {<BR> outputInt = new Array(zero+1).join('0')+strInt;<BR> outputInt = outputInt.substr(outputInt.length-zero,zero)<BR> }<BR> else<BR> {<BR> outputInt = strInt;<BR> }<BR> <BR> var <BR> outputInt = outputInt.substr(0,outputInt.length%comma)+outputInt.substring(outputInt.length%comma).replace(newReg,(comma!=null?',':'')+'$1')<BR> outputInt = outputInt.replace(/^,/,'');<BR> <BR> strInt = outputInt;<BR> }<BR> <BR> if(formatFloat!=null)<BR> {<BR> var outputFloat = '';<BR> var zero = formatFloat.match(/^0*/)[0].length;<BR> <BR> if(strFloat.length<zero)<BR> {<BR> outputFloat = strFloat+new Array(zero+1).join('0');<BR> //outputFloat = outputFloat.substring(0,formatFloat.length);<BR> var outputFloat1 = outputFloat.substring(0,zero);<BR> var outputFloat2 = outputFloat.substring(zero,formatFloat.length);<BR> outputFloat = outputFloat1+outputFloat2.replace(/0*$/,'');<BR> }<BR> else<BR> {<BR> outputFloat = strFloat.substring(0,formatFloat.length);<BR> }<BR> <BR> strFloat = outputFloat;<BR> }<BR> else<BR> {<BR> if(pattern!='' || (pattern=='' && strFloat=='0'))<BR> {<BR> strFloat = '';<BR> }<BR> }<BR> <BR> return strInt+(strFloat==''?'':'.'+strFloat);<BR> }<BR> alert(formatNumber(0,''));<BR> alert(formatNumber(12432.21,'#,###'));<BR> alert(formatNumber(12432.21,'#,###.000#'));<BR> alert(formatNumber(12432,'#,###.00'));<BR> alert(formatNumber(12432.419,'#,###.0#'));<BR> <BR> </script>
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