js打印纸函数代码（递归）

//打印纸尺寸，单位MM 
//http://en.wikipedia.org/wiki/ISO_216 
var page = function() { 
var A0 = { name: "A0", width: 841, height: 1189 }; //单位MM 
var B0 = { name: "B0", width: 1000, height: 1414 }; //单位MM 
var C0 = { name: "C0", width: 917, height: 1297 }; //单位MM 
//获取前一个规格 
function getPrefixSize(name) { 
var list = name.split(''); 
var series = list[0]; 
var number = parseInt(list[1]); 
if (!isNaN(number) && number > 0) { 
return series + (number - 1); 
} 
} 
//获取规格的尺寸 
function getSize(name) { 
if (name == "C7/6") { 
return { name: "C7/6", width: 81, height: 162 }; 
} 
var list = name.split(''); 
var series = list[0]; 
var number = parseInt(list[1]); 
if (isNaN(number)) { 
return; 
} 
if (number == 0) { 
if (series == "A") { return A0; } 
else if (series == "B") { return B0; } 
else if (series == "C") { return C0; } 
} 
return { name: name, width: parseInt(getSize(getPrefixSize(name)).height / 2), height: parseInt(getSize(getPrefixSize(name)).width) }; 
} 
return { 
getSize: getSize 
} 
} ();

用法

page.getSize('A4')