// e-mail ellenorzo REGEXP
var emailRe = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*\.(\w{2}|(com|hu|co.hu|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum))$/

// melyik kep valtozott random utoljara
var lastrand_change = 1;

function display_rand_img_freq()
{
	dir = 'images/randompics/';

	if(document.getElementById('randpics_1') != null)
	{
		switch(lastrand_change)
		{
			case 0 : document.getElementById('randpics_1').src = dir + (Math.floor(Math.random()*37) + 1) + '.jpg';
					 lastrand_change = 1;
					 break;

			case 1 : document.getElementById('randpics_0').src = dir + (Math.floor(Math.random()*37) + 1) + '.jpg';
					 lastrand_change = 0;
					 break;
		}
	}
	else
		document.getElementById('randpics_0').src = dir + (Math.floor(Math.random()*5) + 1) + '.jpg';

}



function turn_arrow_by_id(arrow_id, way, chgtothis)
{
	imgtochg = document.getElementById(arrow_id);

	chgtothis = (chgtothis == undefined ? 'images/arrow_down_turned.gif' : chgtothis);

	switch(way)
	{
		case 'right' : imgtochg.src = 'images/arrow_right_gray_turnable.gif';break;
		case 'down' : imgtochg.src = chgtothis;break;
	}
}

// lellenorzi, hogy helyes karakterek vannak-e a megadott telefonszamban
function check_phonenumber(TheNumber)
{
	var valid = 1
	var GoodChars = "0123456789()-+ "
	var i = 0

	if (TheNumber=="") {
	// Return false if number is empty
	valid = 0
	}
	for (i =0; i <= TheNumber.length -1; i++) {
	if (GoodChars.indexOf(TheNumber.charAt(i)) == -1) {
	// Note: Remove the comments from the following line to see this
	// for loop in action.
	// alert(TheNumber.charAt(i) + " is no good.")
	valid = 0
	} // End if statement
	} // End for loop
	return valid;
}