Convert a String to ASCII (Convert accented characters to normal characters and remove others characters)

toASCII.js

function toASCII(str){
	var newstr = "",
      graph_table = {
		    "\u0132" : "IJ",
		    "\u0152" : "OE",
		    "\u00C6" : "AE",
        "\u00D8" : "O"
	    }
	str = str.normalize("NFD");
	for(var i=0, code, char;i<str.length;i++){
    	code = str.charCodeAt(i),
        char = str.charAt(i);
        if(code<128){
        	newstr += "" + char;
        }
        else if(char.toUpperCase() != char.toLowerCase()){
        	var isLowerCase = char.toLowerCase() == char;
           	char = graph_table[char.toUpperCase()]
            if(char){
            	newstr += isLowerCase ? char.toLowerCase() : char;
            }
       	}
    }
    return newstr
}
/*
/* Example :
/* toASCII("étalon") // "etalon"
/**/