// JavaScript Document
//导航切换代码
function qiehuan(num){
	for(var id = 0;id<=5;id++)
	{
		if(id==num)
		{
			document.getElementById("qh_con"+id).style.display="block";
		}
		else
		{
			document.getElementById("qh_con"+id).style.display="none";
		}
	}
}


/*自适应代码*/
function DrawImage(ImgD, iwidth, iheight)
{
	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; 
            }
        } 
    }
	ImgD.style.display = "block";
}