级联菜单

级联下拉菜单一：

function text(){
		var appkeyArray=document.getElementById("appkeyArray").value;
		//appkeyArray={ "test_appkey1":[["0","abc"],["1","abc"],["2","abc"]], "test_appkey2":[["0","abc"],["1","abc"],["2","abc"]]};
		s1_dom=document.getElementById("appkey"); 
		s2_dom=document.getElementById("splashPicture.id"); alert(s1_dom.value);
		alert(s1_dom);
		alert(s2_dom);
		alert(s1_dom.value);
		alert(s2_dom.value);
		var tmpArray=appkeyArray[s1_dom.value];
		alert("ddddd"+tmpArray);
		//获取一级菜单长度
		var s1_len = s1_dom.length;

		
		for (i=0;i<tmpArray.length;i++)
	    {alert(tmpArray[i]);
			 s2_dom.options[i]=new Option(tmpArray[i][0],tmpArray[i][1]);
		}
		s2_dom.options[0].selected=true;
	}