function hideShow(block_name)
{
testBlockNumber=5;
currentBlockNumber=block_name.substr(10);
for (i=1; i<=testBlockNumber; i++ )
{
	if (i!=currentBlockNumber) {
		if (document.all) {
			document.all['test_block' +i].style.display='none';
			document.all['link' +i].className='tab_simple';
		}
		if (document.layers) {
			document.layers['test_block' +i].style.display='none'; 
			document.layers['link' +i].className='tab_simple';
		}
		
		if (document.getElementById) {
			document.getElementById('test_block' +i).style.display='none';
			document.getElementById('link' +i).className='tab_simple';
		}
	}
}

if (document.all)
{
        st=document.all[block_name].style.display;
       	document.all[block_name].style.display='block';
		document.all['link' +currentBlockNumber].className='tab_active';
		
}
else
if (document.layers)
{
        st=document.layers[block_name].display;
        document.layers[block_name].display='block';  
		document.layers['link' +currentBlockNumber].className='tab_active'; 
       
}
else
if (document.getElementById)
{
        st=document.getElementById(block_name).style.display;
        document.getElementById(block_name).style.display='block'; 
		document.getElementById('link' +currentBlockNumber).className='tab_active'; 
}
}