var mainLayer=new Array(2);
var subLayer0=new Array(7);
var subLayerHttp0=new Array(7);
var subLayer1=new Array(1);
var subLayerHttp1=new Array(1);
//var subLayer2=new Array(5);
//var subLayerHttp2=new Array(5);
//var subLayer3=new Array(5);
//var subLayerHttp3=new Array(5);
var subLayer2=new Array(4);
var subLayerHttp2=new Array(4);
//var subLayer3=new Array(1);
//var subLayerHttp3=new Array(1);
//--------------- 主导航条Table参数调整 ------------//
var mainTableTdWidth=60; //每个TD的宽度，调整主导航内容间距
var mainTableTdHeight=25;
var mainTableBorder=0; //调整主导航表格边框宽度
var mainTableCellspacing=0; //调整主导航表格Cellspacing
var mainTableCellpadding=0; //调整主导航表格Cellpadding
var mainTableBgcolor="#ccffff"; //调整主导航表格背景色
var mainTableBordercolor=""; //调整主导航表格编框颜色
var mainTableBackgroundImg=""; //调整主导航表格背景图片url地址
var hrefClassName="dhfont"; //调整url风格样式
var mainTableTdBgcolor="#ccffff"; //调整主导航表格Td色

//--------------- 次导航条Table参数调整 ------------//
var subTableBorder=1; //调整次导航条表格边框宽度
var subTableCellspacing=0; //调整次导航条表格Cellspacing
var subTableCellpadding=0; //调整次导航条表格Cellpadding
var subTableBgcolor="#ccffff"; //调整次导航条表格背景色
var subTableBordercolor="#ccffff"; //次导航条表格编框颜色
var subTableBackgroundImg=""; //次导航条表格背景图片url地址
var subTableTdBgcolor="#ccffff"; //调整次导航表格Td色
var sbuTabbleTop=25; //次导航表格上下微调
var sbuTabbleLeft=1; //次导航表格左右微调

//--------------- 系统参数*请勿调整 ------------//
var layerMax=mainLayer.length+10;
var layerName="index"

//--------------- 生成下拉菜单 ------------//
function createMainLayer(){ 

	//mainLayer[0]="教研管理 | ";mainLayer[1]=" 实验中心 | ";mainLayer[2]=" 院系主页 | ";mainLayer[3]=" 学生天地 | ";mainLayer[4]=" 精品课程 | ";
	mainLayer[0]="教研管理 | ";mainLayer[1]=" 学生中心 | ";mainLayer[2]=" 精品课程 | ";//mainLayer[3]=" 院系主页 | ";

	subLayer0[0]="- 科研管理";subLayer0[1]="- 教学管理";subLayer0[2]="- 人事管理";subLayer0[3]="- 研究生教学";subLayer0[4]="- 党务学生教育";subLayer0[5]="- 实验设备";subLayer0[6]="- 个人信息";
	subLayerHttp0[0]="http://sme.icmem.org/index_Project.aspx";subLayerHttp0[1]="http://sme.icmem.org/index_Teaching.aspx";subLayerHttp0[2]="http://sme.icmem.org/index_Personnel.aspx";subLayerHttp0[3]="http://sme.icmem.org/index_Graduate.aspx";subLayerHttp0[4]="http://sme.icmem.org/index_Politics.aspx";subLayerHttp0[5]="http://sme.icmem.org/index_Equipment.aspx";subLayerHttp0[6]="http://sme.icmem.org/index_Private.aspx";
		
	//subLayer1[0]="- 中心概况";subLayer1[1]="- 建设管理";subLayer1[2]="- 实验教学";subLayer1[3]="- 网络教学";
	//subLayerHttp1[0]="http://sme.icmem.org/Experiment_Center/Center_Introduction.htm";subLayerHttp1[1]="http://sme.icmem.org/Experiment_Center/Management_Idea.htm";subLayerHttp1[2]="http://sme.icmem.org/Experiment_Center/Experiment_Book.htm";subLayerHttp1[3]="http://sme.icmem.org/Experiment_Center/Internet_VIEW.htm";
	subLayer1[0]="- 机械学子之家";
	subLayerHttp1[0]="http://www.njustjx.com";
	//subLayer2[0]="- ";subLayer2[1]="- ";subLayer2[2]="- ";subLayer2[3]="- ";subLayer2[4]="- ";
	//subLayerHttp2[0]="";subLayerHttp2[1]="";subLayerHttp2[2]="";subLayerHttp2[3]="";subLayerHttp2[4]="";
	
	//subLayer3[0]="- ";subLayer3[1]="- ";subLayer3[2]="- ";subLayer3[3]="- ";subLayer3[4]="- ";
	//subLayerHttp3[0]="";subLayerHttp3[1]="";subLayerHttp3[2]="";subLayerHttp3[3]="m";subLayerHttp3[4]="";
	
	subLayer2[0]="- 机械制造基础";subLayer2[1]="- 弹药学";subLayer2[2]="- 工程制图";subLayer2[3]="- 火炮设计理论";subLayer2[4]="- 固体火箭气体动力学";
	subLayerHttp2[0]="http://jpkc.njust.edu.cn:8080/jixie/";subLayerHttp2[1]="http://jpkc.njust.edu.cn/dyx/";subLayerHttp2[2]="http://jpkc.njust.edu.cn/gczt/";subLayerHttp2[3]="http://jpkc.njust.edu.cn/hpsjll/";subLayerHttp2[4]="http://sme.icmem.org/gthjdlx/index.aspx";

	//subLayer3[0]="- 先进制造技术研究室";
	//subLayerHttp3[0]="http://aml.njust.edu.cn/";

	document.write("<table border=0 cellspacing=0 cellpadding=0><tr><td><div id='wall' onmouseout=layervib('visible','"+layerMax+"') style='position:relative; left:0px; top:0px; width:100%; z-index:1' ><table width='180' height="+mainTableTdHeight+" border='"+mainTableBorder+"' cellspacing='"+mainTableCellpadding+"' cellpadding='"+mainTableCellpadding+"' bgcolor='"+mainTableBgcolor+"' bordercolor='"+mainTableBordercolor+"' background='"+mainTableBackgroundImg+" align=right'><tr>");
	for(i=0;i<mainLayer.length ;i++){
		document.write("<td width='"+mainTableTdWidth+"' height='"+mainTableTdHeight+"' bgcolor='"+mainTableTdBgcolor+"' class='"+hrefClassName+"' onmouseover=layervib('visible','"+i+"')><a href='#' class='"+hrefClassName+"'>"+mainLayer[i]+"</a></td>");
	}
	document.write("</tr></table>");

	for(j=0;j<mainLayer.length ;j++){
		createSubLayer(j,100,0);
	}
	document.write("</div></td></tr></table>");
}


//--------------- 生成每项下拉菜单内容 ------------//
function createSubLayer(num,divWidth,offset){
	var subLayerName= layerName +num;
	var subLayerLeft=(mainTableTdWidth*num)+mainTableCellpadding+mainTableBorder;
	var subLayerList=eval("subLayer"+num);
	var subLayerLeftMargin=subLayerLeft+1-offset;
	var subLayerHttpList=eval("subLayerHttp"+num);
	document.write("<div id='"+subLayerName+"' style='position:absolute; left:"+subLayerLeftMargin+"px; top:"+((mainTableBorder+mainTableCellspacing+mainTableCellpadding)*2+sbuTabbleTop)+"px; z-index:2; height: 70px; visibility: hidden' onmouseover=layervib('visible','"+num+"') onmouseout=layervib('visible','"+layerMax+"')>");
	if(subLayerList.length!=0){
		document.write("<table width='"+divWidth+"' border='"+subTableBorder+"' cellspacing='"+subTableCellpadding+"' cellpadding='"+subTableCellpadding+"' bgcolor='"+subTableBgcolor+"' bordercolor='"+subTableBordercolor+"' background='"+subTableBackgroundImg+"'") 
		for(h=0;h<subLayerList.length;h++){ 
			document.write("<tr><td id='item"+num+"_"+h+"' onmouseover=changelight('item"+num+"_"+h+"','dropmenuHIGH') onmouseout=changelight('item"+num+"_"+h+"','dropmenu')  bgcolor='"+subTableTdBgcolor+"' class='"+hrefClassName+"'><a href='"+ subLayerHttpList [h]+"' class='"+hrefClassName+"'>&nbsp;"+subLayerList[h]+"</a></td></tr>");
			document.write("<tr><td bgcolor='#ccffff' height='1' width='100%'></td></tr>");

		}
		document.write("</table>");
	}
	document.write("</div>"); 

}

function changelight(row, stylename) {
	eval('document.all.' + row + '.className = "' + stylename + '"');
}


//------------------------------次菜单显隐控制--------------------------//4B6B9A
function layervib(type,num){
	var H=type;
	var temp=(H='visible'?'hidden':'visible')
	for(var i=0;i<mainLayer.length ;i++){
		var E=eval('document.all.index'+i+'.style');
		var H=eval(i);
		if(i==num){E.visibility=type}else{E.visibility=temp};
	}
}