window.onload = init;

function init() {
	var search = document.getElementById('SearchString1');
	if (search != null) {
		search.onclick = search_onclick;
		search.onblur = search_onblur;
	}
	
	var fontSize = "10";
	if ((getCookie("imarkFontSize") != null) &&  (getCookie("imarkFontSize") != '')) {
		fontSize =  getCookie("imarkFontSize");
	}
	if (fontSize != 10) {
		document.body.style.fontSize = getPercentSize(fontSize) + "%";
	}

}

function search_onclick() {
	var search = document.getElementById('SearchString1');
	if (search.value == 'Sláðu inn leitarorð') {
		search.value = '';
	}
}

function search_onblur() {
	var search = document.getElementById('SearchString1');
	if (search.value == '') {
		search.value = 'Sláðu inn leitarorð';
	}
}

function enlargeFont() {
	var size = getCookie("imarkFontSize");
	if (size == null) {
		size = 10;
	}
	size++;
	if (size > 14) {size = 14}
	document.body.style.fontSize = getPercentSize(size)+'%';
	setCookie("imarkFontSize",size);
}

function shrinkFont() {
	var size = getCookie("imarkFontSize");
	if (size == null) {
		size = 10;
	}
	size--;
	if (size < 9) {size = 9}
	document.body.style.fontSize = getPercentSize(size)+'%';
	setCookie("imarkFontSize",size);
}

function restoreSize() {
	size = "10";
	document.body.style.fontSize = getPercentSize(size)+'%';
	setCookie("imarkFontSize",size);	
}

function getPercentSize(size) {
	return (size/16)*100;
}

function setCookie(cookieName,cookieValue) {
	var today = new Date();
	var expire = new Date();
	expire.setTime(today.getTime() + 3600000*24*1000);
	document.cookie = cookieName + "=" + escape(cookieValue) + ";expires="+expire.toGMTString();
}

function getCookie(cookieName) {
	oCookie = document.cookie;
	var index = oCookie.indexOf(cookieName + "=");
	if (index == -1) return null;
	index = oCookie.indexOf("=", index) + 1;
	var endstr = oCookie.indexOf(";", index);
	if (endstr == -1) endstr = oCookie.length;
	return unescape(oCookie.substring(index, endstr));
}

/* General form-validation */

function validate(form) {
	var isValid = true;
	for (var i = 0; i < form.elements.length; i++) {
		var elem = form.elements[i];
		if (elem.className.indexOf('reqd') > 0) {
			
			/* input, select og textarea er höndlað á sama hátt .... */
			if ((elem.tagName == "INPUT") || (elem.tagName == "TEXTAREA") || (elem.tagName == "SELECT")) {			
				if (elem.className.indexOf('emailval') > 0) {
					isValid = isValidEmail(elem.value);
				} else {
					isValid = (elem.value != '');
				}
				
				if (!isValid) {
					alert(elem.title + ' er ekki rétt útfyllt!');
					elem.focus();
					elem.style.borderColor = '#FF4A4A';
					elem.style.backgroundColor = '#FDFAD0';
					return false;
				} else {
					elem.style.borderColor = '';
					elem.style.backgroundColor = '';
				}
			}			
		}
	}
	return true;
}

function isValidEmail(value) {
	return (value.indexOf(".") > 2) && (value.indexOf("@") > 0);
}

function ShowNext(intImageCount,  strTarget, strVarPreFix, intImageCount,intDelay)
{

	if (document.images[strTarget].filters)
	{
		document.images[strTarget].style.filter="blendTrans(duration=2)";
		document.images[strTarget].filters.blendTrans.apply();
		document.images[strTarget].src=eval(strVarPreFix + CurrentImage + ".src");
		document.images[strTarget].filters.blendTrans.play();
	}
	else
	{
		document.images[strTarget].src = eval(strVarPreFix + ".src");
	}

		
	if (CurrentImage < intImageCount)
	{
		CurrentImage++;
	}
	else
	{
		CurrentImage=Math.round(Math.random()*(intImageCount-1));
	}
	//alert(CurrentImage); 
	setTimeout("ShowNext4('" + intImageCount + "','" + strTarget + "','" + strVarPreFix + "'," + intImageCount + "," + intDelay + ")",intDelay);
}

function viewImage(imgPos)
{
	document.getElementById('largeview').src = '/lisalib/getfile.aspx?proc=3&itemid=' + images[imgPos];
	//document.getElementById('caption').firstChild.nodeValue = arrCaption[imgPos];
	
	if(imgPos == imgCount-1)
	{
		document.getElementById('nextImg').style.visibility = 'hidden';
	} else {
		document.getElementById('nextImg').style.visibility = 'visible';		
	}
			
	if(imgPos == 0)
	{
		document.getElementById('prevImg').style.visibility = 'hidden';	
	} else {
		document.getElementById('prevImg').style.visibility = 'visible';	
	}
	imgIndex = imgPos;

}				

function viewNext()
{
	if (imgIndex != images.length)
	{
		imgIndex++;
		viewImage(imgIndex);
	}
}

function viewLast()
{
	if (imgIndex != 0)
	{
		imgIndex--;
		viewImage(imgIndex);
		}
}