PICA-MEQUE

var arKanaHan = ("｡｢｣､･ｦｧｨｩｪｫｬｭｮｯｰ" +
		 "ｱｲｳｴｵｶｷｸｹｺｻｼｽｾｿﾀﾁﾂﾃﾄﾅﾆﾇﾈﾉﾊﾋﾌﾍﾎﾏﾐﾑﾒﾓﾔﾕﾖﾗﾘﾙﾚﾛﾜﾝﾞﾟ").split("");
var arKanaZen = ("。「」、・ヲァィゥェォャュョッー" + 
		 "アイウエオカキクケコサシスセソタ" +
		 "チツテトナニヌネノハヒフヘホマミムメモ" + 
		 "ヤユヨラリルレロワン゛°").split("");
var arKanaHanTmp = ("ウ゛ カ゛ キ゛ ク゛ ケ゛ コ゛ サ゛ シ゛ ス゛ " + 
		    "セ゛ ソ゛ タ゛ チ゛ ツ゛ テ゛ ト゛ ハ゛ ヒ゛ " + 
		    "フ゛ ヘ゛ ホ゛ ハ° ヒ° フ° ヘ° ホ°").split(" ");
var arKanaZenAll = ("ヴガギグゲゴザジズゼゾダヂヅデド" + 
		    "バビブベボパピプペポ").split("");
var arAscHan = ("!\"#$%&\'()*+,-./0123456789:;<=>?" + 
		"@ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
		"abcdefghijklmnopqrstuvwxyz{|}~\\ ").split("");
var arAscZen = ("！”＃＄％＆’（）＊＋，－．／" + 
		"０１２３４５６７８９：；＜＝＞？＠" +
		"ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺ" +
		"ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ" + 
		"｛｜｝～￥　").split("");

// 使用例
t = "abcabc（（ａ((()))\"\"\"||| ) ))グバビビビﾌﾟﾌﾟﾌﾟ";
WScript.Echo("元：" + t + "\r\n全：" + toZen(t) + "\r\n半：" + toHan(t));

function toHan(s){
	var newstr = s;
	var re = new RegExp();
	for(key in arAscZen){
	    re = RegExp(arAscZen[key], "g");
	    newstr = newstr.replace(re, arAscHan[key]);
	}
	for(key in arKanaZenAll){
	    re = RegExp(arKanaZenAll[key], "g");
	    newstr = newstr.replace(re, arKanaHanTmp[key]);
	}
	for(key in arKanaZen){
	    re = RegExp(arKanaZen[key], "g");
	    newstr = newstr.replace(re, arKanaHan[key]);
	}
	return newstr;
}

function toZen(s){
	var newstr = s;
	var re = new RegExp();
	for(key in arKanaHan){
	    re = RegExp(arKanaHan[key], "g");
	    newstr = newstr.replace(re, arKanaZen[key]);
	}

	for(key in arKanaHanTmp){
	    re = RegExp(arKanaHanTmp[key], "g");
	    newstr = newstr.replace(re, arKanaZenAll[key]);
	}
	for(key in arAscHan){
	    if(arAscHan[key].match(/[\(\)\\\+\*\?\{\}\.\^\$\|]/)){
		re = RegExp("\\" + arAscHan[key], "g");
	    }else{
		re = RegExp(arAscHan[key], "g");
	    }
	    newstr = newstr.replace(re, arAscZen[key]);
	}
	return newstr;
}