function ChosenItem( id ){

	id_left = "left_"+id;
	id_right = "right_"+id;
	ids ="n"+ id;
	if( document.getElementById(id_left) != null && document.getElementById(id_right) != null ){

		document.getElementById(id_left).innerHTML = "<img src='images/right_curve.jpg'>";
		document.getElementById(id_right).innerHTML = "<img src='images/left_curve.jpg'>";
		document.getElementById(id_right).style.border = "0px";
		document.getElementById(id_left).style.paddingLeft = "0px";
		document.getElementById(id_left).style.border = "0px";
		document.getElementById(ids).style.border = "0px";
		document.getElementById(ids).style.verticalAlign = "bottom";
		document.getElementById(ids).style.backgroundColor = "#FFFFFF";

	}


}

function gotoURL( url ){
	window.location.href = url;
}

function ChosenMonth( mon , year ){


	month = 'month_'+mon+'_'+year;
	link = 'link_'+mon+'_'+year;
	//alert(month);
	document.getElementById( month ).innerHTML = "<img src='images/chosen_month.jpg' />";
	document.getElementById( link ).style.color="#86C555";

}

function getScrollXY() {
	var scrOfX = 0, scrOfY = 0;
	if( typeof( window.pageYOffset ) == 'number' ) {
		//Netscape compliant
		scrOfY = window.pageYOffset;
		scrOfX = window.pageXOffset;
	} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
		//DOM compliant
		scrOfY = document.body.scrollTop;
		scrOfX = document.body.scrollLeft;
	} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
		//IE6 standards compliant mode
		scrOfY = document.documentElement.scrollTop;
		scrOfX = document.documentElement.scrollLeft;
	}

	x = document.documentElement.clientWidth/2;
	y = document.documentElement.clientHeight/2;
	//  imgwidth = ( document.images['img1'].width /2 );
	//  imgheight = ( document.images['img1'].height /2 );

	imgwidth = 200;
	imgheight = 50;
	//alert( x - imgwidth );
	// alert( scrOfX);
	// alert(scrOfY);

	return [ (  x - imgwidth )   , (scrOfY + imgheight ) ];//y +
}

function DefineWidthMenu(){

	var anchorTags = document.getElementsByTagName("li");

	for (var i = 0; i < anchorTags.length ; i++)
	{
		//   alert("Href of this a element is : " + anchorTags[i].style.width + "\n");
	}


}

function openImg( src ){

	document.getElementById('photo_event').innerHTML = "<img id='img1' src='"+src+"'>";

	document.getElementById('big_photo').style.display ="block";

	arr = getScrollXY();

	//	alert(arr[0]);

	//	alert(arr[1]);

	height =  arr[0]+"px";

	ww =   arr[1]+"px";

	document.getElementById('big_photo').style.left = height;

	document.getElementById('big_photo').style.top = ww;

}

function CloseImg(){

	document.getElementById('big_photo').style.display ="none";

}

function getSizeofMenu(){
	//alert(document.getElementById('ulMenu').size);
}



/************ registration *************/



function trim( stringToTrim ){

	return stringToTrim.replace( /^\s+|\s+$/g , "" );

}


function validEmail( email ){

	invalidChars = " /:,;";


	if ( email == "" ){

		return false;
	}


	for( i = 0; i < invalidChars.length; i++ ){

		badChar = invalidChars.charAt(i)

		if (email.indexOf(badChar, 0) > -1){

			return false;
		}
	}


	atPos = email.indexOf("@", 1);

	if (atPos == -1){

		return false;
	}


	if (email.indexOf("@", atPos+1) > -1){

		return false;
	}

	periodPos = email.indexOf(".", atPos);


	if (periodPos == -1){  
		
		return false;
	}
	
	
	if (periodPos + 3 > email.length){  
		
		return false;
	}
	
	return true;
}




function validUserForm( passForm ) {

	if ( trim( passForm.username.value) == "" ){

		alert("Моля , въведете потребителско име.");
		passForm.username.focus();
		return false;
	}


	if ( passForm.password && trim( passForm.password.value ) == "" ){

		alert("Моля , въведете парола.");
		passForm.password.focus();
		return false;
	}


	if ( passForm.password2 && trim( passForm.password2.value ) == ""){

		alert("Моля , потвърдете въведената парола .");
		passForm.password2.focus();
		return false;
	}


	if ( passForm.password && passForm.password2 && (passForm.password.value != passForm.password2.value ) ){

		alert("Двете пароли не съвпадат .");
		passForm.password.focus();
		passForm.password.select();
		return false;
	}



	if ( passForm.email.value != "" && !validEmail( passForm.email.value ) ){

		alert("Моля , въведете валиден имейл адрес .");
		passForm.email.focus();
		passForm.email.select();
		return false;
	}


	if( passForm.email.value == '' ){

		alert("Моля , въведете имейл адрес .");
		return false;
	}

	return true;
}



function validQueryForm( passForm ) {

	/*if ( trim( passForm.name.value) == "" ){

		alert("Моля , въведете потребителско име.");
		passForm.username.focus();
		return false;
	}*/





	if ( passForm.query_email.value != "" && !validEmail( passForm.query_email.value ) ){

		alert("Моля , въведете валиден имейл адрес .");
		passForm.query_email.focus();
		passForm.query_email.select();
		return false;
	}


	if( passForm.query_email.value == '' ){

		alert("Моля , въведете имейл адрес .");
		return false;
	}

	return true;
}




function validateNewsletter( passForm ) {
	
	if ( passForm.news_email.value != "" && !validEmail( passForm.news_email.value ) ){

		alert("Моля , въведете валиден имейл адрес .");
		passForm.news_email.focus();
		passForm.news_email.select();
		return false;
	}


	if( passForm.news_email.value == '' ){

		alert("Моля , въведете имейл адрес .");
		return false;
	}

	return true;
}