function hideShow(block_name)
{
	
blockCount=3;
//currentBlockNumber=block_name.substr(10);
for (i=1; i<=blockCount; i++ )
{
	if (i!=block_name) {
		if (document.all) {
			document.all['tab' +i].style.display='none';
			document.all['tab_header' +i].className= 'tab_default';
		}
		if (document.layers) {
			document.layers['tab' +i].style.display='none'; 
			document.layers['tab_header' +i].className= 'tab_default';
		}
		
		if (document.getElementById) {
			document.getElementById('tab' +i).style.display='none';
			document.getElementById('tab_header' +i).className= 'tab_default';
		}
	}
}

if (document.all)
{
        document.all['tab' + block_name].style.display='block';		
		document.all['tab_header' +block_name].className= 'tab_current';
		
}
else
if (document.layers)
{
        document.layers['tab' + block_name].display='block';  		
		document.layers['tab_header' +block_name].className= 'tab_current';
       
}
else
if (document.getElementById)
{
        document.getElementById('tab' + block_name).style.display='block'; 		
		document.getElementById('tab_header' +block_name).className= 'tab_current';
}

}