Match ASCII chars via RegularExpression in Javascript

gistfile1.js

/**
 * Small regular expression to match ASCII-chars between 32-126
 *
 * For a conversion table for ASCII chars see: 
 * http://de.wikipedia.org/wiki/American_Standard_Code_for_Information_Interchange
 */
var expr = /([\x20-\x7E]{1,})/gi;
var testString = "Foo Bar Barz";
var testString2 = "Foo Bar\tBarz";

// Test
console.log(testString.match(expr)[0]===testString); // is true;
console.log(testString2.match(expr)[0]===testString2); // is false;