Shift-JIS Letter Fixer

Replaces Shift-JIS encoded Latin letters with Unicode equivalents, making pages a bit more searchable
当前为 2016-01-06 提交的版本，查看最新版本。
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// ==UserScript==
// @name          Shift-JIS Letter Fixer
// @namespace     DoomTay
// @description   Replaces Shift-JIS encoded Latin letters with Unicode equivalents, making pages a bit more searchable
// @version       1.0.1
// @grant         none

// ==/UserScript==

var replacementTable = [
	["Ａ","A"],
	["Ｂ","B"],
	["Ｃ","C"],
	["Ｄ","D"],
	["Ｅ","E"],
	["Ｆ","F"],
	["Ｇ","G"],
	["Ｈ","H"],
	["Ｉ","I"],
	["Ｊ","J"],
	["Ｋ","K"],
	["Ｌ","L"],
	["Ｍ","M"],
	["Ｎ","N"],
	["Ｏ","O"],
	["Ｐ","P"],
	["Ｑ","Q"],
	["Ｒ","R"],
	["Ｓ","S"],
	["Ｔ","T"],
	["Ｕ","U"],
	["Ｖ","V"],
	["Ｗ","W"],
	["Ｘ","X"],
	["Ｙ","Y"],
	["Ｚ","Z"],
	["ａ","a"],
	["ｂ","b"],
	["ｃ","c"],
	["ｄ","d"],
	["ｅ","e"],
	["ｆ","f"],
	["ｇ","g"],
	["ｈ","h"],
	["ｉ","i"],
	["ｊ","j"],
	["ｋ","k"],
	["ｌ","l"],
	["ｍ","m"],
	["ｎ","n"],
	["ｏ","o"],
	["ｐ","p"],
	["ｑ","q"],
	["ｒ","r"],
	["ｓ","s"],
	["ｔ","t"],
	["ｕ","u"],
	["ｖ","v"],
	["ｗ","w"],
	["ｘ","x"],
	["ｙ","y"],
	["ｚ","z"],
	["０","0"],
	["１","1"],
	["２","2"],
	["３","3"],
	["４","4"],
	["５","5"],
	["６","6"],
	["７","7"],
	["８","8"],
	["９","9"]
	];
	
function replaceText(node, scan, replacement) {
	var nodes = node.childNodes;
	for (var n=0; n<nodes.length; n++) {				
		if(nodes[n].nodeType == Node.TEXT_NODE && nodes[n].textContent.trim().indexOf(scan) > -1)
		{
			while(nodes[n].textContent.indexOf(scan) > -1) nodes[n].textContent = nodes[n].textContent.replace(scan,replacement);
		}
		
		//Nothing in this node. Look at the children of this node.
		else
		{
			replaceText(nodes[n],scan,replacement);
		}
	}
}

for(var i = 0; i < replacementTable.length; i++)
{
	replaceText(document.body,replacementTable[i][0], replacementTable[i][1]);
}