function setCheckboxes(status) {
	for (var i = 0; i < document.list.length; i++) {
		document.list.elements[i].checked = status;
	}
}
function Confirm() {
	return window.confirm('Вы уверены ?');
}

function showhide(el, el_text, text_show, text_hide) {
	if (el.style.display == 'none') {
		el.style.display = 'block';
		el_text.innerHTML = text_hide;
	} else {
		el.style.display = 'none';
		el_text.innerHTML = text_show;
	}
}

function PNG(element)
{
if (/MSIE (5\.5|6).+Win/.test(navigator.userAgent))
{
var src;

if (element.tagName=='IMG')
{
if (/\.png$/.test(element.src))
{
src = element.src;
element.src = "/img/t.gif";
}
}
else
{
src = element.currentStyle.backgroundImage.match(/url\("(.+\.png)"\)/i)
if (src)
{
src = src[1];
element.runtimeStyle.backgroundImage="none";
}
}

if (src) element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "',sizingMethod='scale')";
}
}