var test1 = new Boolean(1);
var test2 = new Boolean(0);
var test3 = new Boolean(true);
var test4 = new Boolean(false);
var test5 = new Date();
var test6 = new String("999");
var test7 = 12345;
document.write("var test1 = new Boolean(1); 转为字符串:" + String(test1) + "<br />");
document.write("var test2 = new Boolean(0); 转为字符串:" + String(test2) + "<br />");
document.write("var test3 = new Boolean(true);转为字符串:" + String(test3) + "<br />");
document.write("var test4 = new Boolean(false);转为字符串:" + String(test4) + "<br />");
document.write("var test5 = new Date(); 转为字符串:" + String(test5) + "<br />");
document.write("var test6 = new String('999'); 转为字符串:" + String(test6) + "<br />");
document.write("var test7 = 12345; 转为字符串:" + String(test7) + "<br />");