修改frameset的框架格局

boss要求，把top的那个frame能伸缩，网上查了一下，发现比想象中的简单好多

代码

1.frameset

<frameset id="main" name=main rows="118,*" cols="*" frameborder="no" border="0" framespacing="0">
	<frame src="${ctx }/top?provinceSign=0"  scrolling="No" noresize="noresize" id=TopTitle name=TopMenu  title="topFrame"/> 
    	<frame src="${ctx}/gis/scene/scene" id=MainTitle name=MainMenu   title="mainFrame"  scrolling="yes"/>
</frameset>

2.frame页面

<img id="topimg" src="static/images/top/arrow_large_up_outline.png" onClick="frame()" style="float:right;height:36px">

最关键的代码

var flag=1;
function frame(){
    if(flag==2){
        flag=1;
        parent.document.getElementById("main").rows="118,*";
        $("#topimg").attr('src',"static/images/top/arrow_large_up_outline.png");
        topimg.alt="隐藏主菜单"
       	$("#headertop1").show();
    }
    else
    {
        flag=2;
        $("#topimg").attr('src',"static/images/top/arrow_large_down_outline.png");
        $("#topimg").attr('alt',"显示主菜单");
        parent.document.getElementById("main").rows="36,*";
        $("#headertop1").hide();
    }
}