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> function formatNumber(number,pattern) { var str = number.toString(); var strInt; var strFloat; var formatInt; var formatFloat; if(/\./g.test(pattern)) { formatInt = pattern.split('.')[0]; formatFloat = pattern.split('.')[1]; } else { formatInt = pattern; formatFloat = null; } if(/\./g.test(str)) { if(formatFloat!=null) { var tempFloat = Math.round(parseFloat('0.'+str.split('.')[1])*Math.pow(10,formatFloat.length))/Math.pow(10,formatFloat.length); strInt = (Math.floor(number)+Math.floor(tempFloat)).toString(); strFloat = /\./g.test(tempFloat.toString())?tempFloat.toString().split('.')[1]:'0'; } else { strInt = Math.round(number).toString(); strFloat = '0'; } } else { strInt = str; strFloat = '0'; } if(formatInt!=null) { var outputInt = ''; var zero = formatInt.match(/0*$/)[0].length; var comma = null; if(/,/g.test(formatInt)) { comma = formatInt.match(/,[^,]*/)[0].length-1; } var newReg = new RegE<a href="../InfoList/Catalog_26_1.html" target="_blank" title="XP" class="sitelink">XP</a>('(\\d{'+comma+'})','g'); if(strInt.length<zero) { outputInt = new Array(zero+1).join('0')+strInt; outputInt = outputInt.substr(outputInt.length-zero,zero) } else { outputInt = strInt; } var outputInt = outputInt.substr(0,outputInt.length%comma)+outputInt.substring(outputInt.length%comma).replace(newReg,(comma!=null?',':'')+'$1') outputInt = outputInt.replace(/^,/,''); strInt = outputInt; } if(formatFloat!=null) { var outputFloat = ''; var zero = formatFloat.match(/^0*/)[0].length; if(strFloat.length<zero) { outputFloat = strFloat+new Array(zero+1).join('0'); //outputFloat = outputFloat.substring(0,formatFloat.length); var outputFloat1 = outputFloat.substring(0,zero); var outputFloat2 = outputFloat.substring(zero,formatFloat.length); outputFloat = outputFloat1+outputFloat2.replace(/0*$/,''); } else { outputFloat = strFloat.substring(0,formatFloat.length); } strFloat = outputFloat; } else { if(pattern!='' || (pattern=='' && strFloat=='0')) { strFloat = ''; } } return strInt+(strFloat==''?'':'.'+strFloat); } alert(formatNumber(0,'')); alert(formatNumber(12432.21,'#,###')); alert(formatNumber(12432.21,'#,###.000#')); alert(formatNumber(12432,'#,###.00')); alert(formatNumber(12432.419,'#,###.0#'));</script>
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