function content_bg(url,height)
{
	document.getElementById('content').style.background='url('+url+') no-repeat';
	document.getElementById('content').style.height=height;
}

function test()
{
}

function DrawImage(ImgD,iwidth,iheight)
{
//参数(图片,允许的宽度,允许的高度)
    var image=new Image(); 
    image.src=ImgD.src; 
    if(image.width>0 && image.height>0)
    { 
        if(image.width/image.height>= iwidth/iheight)
        {
            if(image.width>iwidth)
            { 
                ImgD.width=iwidth; 
                ImgD.height=(image.height*iwidth)/image.width; 
            }
            else
            { 
                ImgD.width=image.width; 
                ImgD.height=image.height; 
            } 
        }    
        else
        { 
            if(image.height>iheight)
            { 
                ImgD.height=iheight; 
                ImgD.width=(image.width*iheight)/image.height; 
            }
            else
            {
                ImgD.width=image.width; 
                ImgD.height=image.height; 
            } 
        } 
    } 
}