function checkRequest(f)
{
	if (f.Name.value == '')
	{
		f.Name.focus();
		alert('Введите Ваше имя');
		return false;
	}
	if ((f.Contacts.value.length + f.Email.value.length) == 0){
		alert('Введите свою контактную информацию');
		if (f.Contacts.value == '')
		{
			f.Contacts.focus();
			return false;
		}
		if (f.Email.value == '')
		{
			f.Email.focus();
			return false;
		}
	}
	if (f.Text.value == '')
	{
		f.Text.focus();
		alert('Введите текст заявки');
		return false;
	}

	if (f.Text.value.length > 1400)
	{
		f.Text.focus();
		alert('Текст слишком длинный');
		return false;
	}
    return true;
}
if(!document.attachEvent)
{
	Element.prototype.attachEvent=function(e,f){this.addEventListener(0==e.indexOf('on')?e.substr(2):e, f, false)}
	Element.prototype.detachEvent=function(e,f){this.removeEventListener(0==e.indexOf('on')?e.substr(2):e, f, false)}
}
if(window.event)
{
	window.event.preventDefault=function(){window.event.returnValue=false;}
}
function getRealDisplay(elem) {
	if (elem.currentStyle) {
		return elem.currentStyle.display
	} else if (window.getComputedStyle) {
		var computedStyle = window.getComputedStyle(elem, null )

		return computedStyle.getPropertyValue('display')
	}
}

function hide(el) {
	if (!el.getAttribute('displayOld')) {
		el.setAttribute("displayOld", el.style.display)
	}

	el.style.display = "none"
}

displayCache = {}

function isHidden(el) {
	var width = el.offsetWidth, height = el.offsetHeight,
		tr = el.nodeName.toLowerCase() === "tr"

	return width === 0 && height === 0 && !tr ?
		true : width > 0 && height > 0 && !tr ? false :	getRealDisplay(el)
}

function toggle(el) {
	isHidden(el) ? show(el) : hide(el)
}


function show(el) {

	if (getRealDisplay(el) != 'none') return

	var old = el.getAttribute("displayOld");
	el.style.display = old || "";

	if ( getRealDisplay(el) === "none" ) {
		var nodeName = el.nodeName, body = document.body, display

		if ( displayCache[nodeName] ) {
			display = displayCache[nodeName]
		} else {
			var testElem = document.createElement(nodeName)
			body.appendChild(testElem)
			display = getRealDisplay(testElem)

			if (display === "none" ) {
				display = "block"
			}

			body.removeChild(testElem)
			displayCache[nodeName] = display
		}

		el.setAttribute('displayOld', display)
		el.style.display = display
	}
}