function add_image_show()
{
	document.getElementById('div_thumb').style.visibility = 'visible';
	document.getElementById('div_thumb').style.display = 'block';
	document.getElementById('img_thumb').src = document.getElementById('photo_file').value	
}
function chcek_float(e)
{
		
	var isIE = (window.event) ? 1 : 0;
	if (isIE)
	{
		if (e.keyCode < 46 || e.keyCode >57 ) 
		{ 
			e.returnValue = false;
		}
	}
	else
	{

		if ( e.which < 46 || e.which >57 ) 
		{
			if ( e.which != 8 ) e.preventDefault();
		}
	}

}