function doClick1(o){
    var d;
    var j;
    var id;
    for(var i=1;i<=6;i++){
        id ="d"+i;
        j = document.getElementById(id); 
        j.className="";
    }
    img = eval("document.getElementById('about')");
    img1 = eval("document.getElementById('cpzs')");
    if(o=="d2")
	{   
	   
		img.style.display = "block";
		img1.style.display = "none";
	}
	else
	{
	    
		img.style.display = "none";
		img1.style.display = "block";
    }

	d = eval("document.getElementById('"+o+"')");
	d.className="l";
}