// JavaScript Document

function nav(matrix,j)
{
	count = matrix;
    for (var x=1;x<=count;x++){
        var obj1= document.getElementById("nav"+x+"");
        if (j==x){
            obj1.className = "now";
            show(x);
        }else{
            obj1.className = "";
        }
    }
}

function show(x)
{
    for(var a=1;a<=count;a++){
        var obj1= document.getElementById("section_"+a+"");
        if(a==x){
            obj1.style.display='';
        }
        else{
            obj1.style.display='none';
        }
    }
}