// JScript File

var visible_div = null;
function show_hide( id )
{
	if ( visible_div )
		{ hide_div(visible_div); } 
	
	visible_div = document.getElementById(id);
	show_div( visible_div, id );
}  

function show_div( n, id ) 
	{
	
	 n.style.display = ""; 
	 if(id == 'c1')
	    {
	        document.getElementById("divleft").className = "left";
	    }
	else if(id == 'c2')
	    {
	        document.getElementById("divleft").className = "left1";
	    }
	else if(id == 'c3')
	    {
	        document.getElementById("divleft").className = "left2";
	    }
        else if(id == 'c4')
	    {
	        document.getElementById("divleft").className = "left3";
	    }
	 }

function hide_div( n )
	{ 
	n.style.display = "none"; }

window.onload = function()
{
	visible_div = document.getElementById( 'c1' );
	show_div( visible_div );
	hide_div( document.getElementById( 'c2' ) );
	hide_div( document.getElementById( 'c3' ) );
}