function ellenoriz() {
	if(document.kereses.keres.value=="") {
		alert('Nincs keresesi feltetel megadva!');
		return(false);
	} else {
		return(true);
	}
}

function Set_Cookie( name, value, expires, path, domain, secure ) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	// if the expires variable is set, make the correct expires time, the
	// current script below will set it for x number of days, to make it
	// for hours, delete * 24, for minutes, delete * 60 * 24
	if ( expires )
	{
		expires = expires * 1000 * 60 * 60 * 24;
	}
	//alert( 'today ' + today.toGMTString() );// this is for testing purpose only
	var expires_date = new Date( today.getTime() + (expires) );
	//alert('expires ' + expires_date.toGMTString());// this is for testing purposes only

	document.cookie = name + "=" +escape( value ) +
		( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + //expires.toGMTString()
		( ( path ) ? ";path=" + path : "" ) + 
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}

function hide(name) {
	document.getElementById(name).style.visibility = "hidden";
}

function show(name) {
	document.getElementById(name).style.visibility = "visible";
}

var browser_IE_NS = (document.body.clientHeight) ? 1 : 0;
var browser_MOZ = (self.innerWidth) ? 1 : 0;
var browser_IE7 = (document.documentElement.clientHeight) ? 1 : 0;
var Browser_Width, Browser_Height;

if (browser_IE_NS)
{
	Browser_Width = document.body.clientWidth;
	Browser_Height = document.body.clientHeight;
}
else if (browser_MOZ)
{
	Browser_Width = self.innerWidth - 20;
	Browser_Height = self.innerHeight;
}
else if (browser_IE7)
{
	Browser_Width = document.documentElement.clientWidth;
	Browser_Height = document.documentElement.clientHeight;
}

Set_Cookie("Browser_Width", Browser_Width);
Set_Cookie("Browser_Height", Browser_Height);