用Javascript数组处理多个字符串的连接问题

var str = new Array(); 
str[0] = '<li id="domain-{0}">'.replace('{0}', 'domainid'); 
str[1] = 'domainname'; 
str[2] = '<input type="hidden" name="domainids" value="{0}">'.replace('{0}', 'domainid'); 
str[3] = '</li>'; 
alert(str.join(''));

var str2 = [ 
'<li id="domain-{0}">'.replace('{0}', 'domainid'), 
'domainname', 
'<input type="hidden" name="domainids" value="{0}">'.replace('{0}', 'domainid'), 
'</li>' 
]; 
alert(str2.join(''));