js创建select

function addOption() 
{ 
	var s = document.createElement("select") ;
	var d = [{t:'one',v:'1'},{t:'two',v:'2'}] ;
	for(var i in d){					
		 var option = new Option(d[i].t,d[i].v);					
		 s.options.add(option);
	}				
	document.getElementById( "form1").appendChild(s); 
}