function EnterForm(){
	var enter_block = document.getElementById("enter");
	var form_block = document.getElementById("form");
	enter_block.style.display = "none";
	form_block.style.display = "block";
	return false;
}

var oldDiv, oldHeader;
function HideNewsBlock( td, div, box )
{
	if( !oldDiv )
	{
		allBlock = document.getElementById( box );
		var blocks = allBlock.getElementsByTagName('div');
		
		for( var i=0;i<blocks.length;i++ )
		{
			if( blocks[i].className == 'tab_descript' )
			{
				if( blocks[i].style.display == '' )oldDiv = blocks[i];
			}
		}
		
		allBlock = document.getElementById( 'inset_header' );
		blocks = allBlock.getElementsByTagName('td');
		
		for( var i=0;i<blocks.length;i++ )if( blocks[i].className == 'active tab' )oldHeader=blocks[i];
	}
	
	if( oldDiv )
	{
		oldDiv.style.display = 'none';
		if( oldHeader.className =='active' )oldHeader.className = 'last';
			else oldHeader.className = 'tab';
	}
	var newDiv = document.getElementById( div );

	newDiv.style.display = '';
	td.className = td.className + " active";
	
	oldDiv = newDiv;
	oldHeader = td;	
	return false;
}