var d = document;

/* Style sheet switching
*******************************************************************************/

function setActiveStyleSheet(title) {
	var i, a, main;
	var found = 0;
	for (i=0; (a = d.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
			a.disabled = true;
			if(a.getAttribute("title") == title) {
				a.disabled = false;
				found = 1;
			}
		}
	}
	if (found == 0) {
		//bogusStyleSheet();
		title = getPreferredStyleSheet();
		if (title) setActiveStyleSheet(title);
	}
}

function bogusStyleSheet() {
	var i, a, main;
	for(i=0; (a = d.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
			a.disabled = false;
		}
	}
	title = getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

function getActiveStyleSheet() {
	var i, a;
	for(i=0; (a = d.getElementsByTagName("link")[i]); i++) {
		if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled)
		return a.getAttribute("title");
	}
	return null;
}

function getPreferredStyleSheet() {
	var i, a;
	for(i=0; (a = d.getElementsByTagName("link")[i]); i++) {
		if (a.getAttribute("rel").indexOf("style") != -1
		&& a.getAttribute("rel").indexOf("alt") == -1
		&& a.getAttribute("title"))
		return a.getAttribute("title");
	}
	return null;
}

/* Cookies
*******************************************************************************/

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else expires = "";
	d.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = d.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

/* Forms
*******************************************************************************/

function initForm() {
	var d = document;
	var form = d.getElementById('section-1').getElementsByTagName('FORM')[0];
	if (!form) return;
	if (d.getElementById('search-results')) return;
	
	//alert('form');
	var textareas = form.getElementsByTagName('TEXTAREA');
	var inputs = form.getElementsByTagName('INPUT');
	
	var frmTxtBoxes = new Array();
	var ti = 0;
	
	for(var i = 0, len = textareas.length; i < len; i++){
		frmTxtBoxes[ti] = textareas[i];
		ti++;
	}
	for(var i = 0, len = inputs.length; i < len; i++){
		if (inputs[i].type == "text") {
			frmTxtBoxes[ti] = inputs[i];
			ti++;
		}
	}

	for (var i = 0, len = frmTxtBoxes.length; i < len; i++) {
		var currinput = frmTxtBoxes[i];
		if (currinput) {
			currinput.onfocus = clearDefaultVal;
			currinput.onblur = resetDefaultVal;
		}
	}

	//form.onsubmit = checkform;
}

function clearDefaultVal() {

	this.className = "txtfocus";
}

function resetDefaultVal() {
	var d = document;
	var frmName = d.getElementById('fullname');
	var frmEmail = d.getElementById('email');
	var frmEnquiry = d.getElementById('enquiry');

	if (is_empty(this.value) || this.value == this.defaultValue) { 
		this.value = this.defaultValue;
		this.className = (this == frmName || this == frmEmail || this == frmEnquiry) ? 'txterror' : 'txt';
	} else {
		this.className = "txtok";
	}
}

function is_empty(val) {
	var empty = /^\s*$/;
	return empty.test(val);
}




/* Perform on page load/unload
*******************************************************************************/

window.onload = function(e) {
	if (d.getElementById) {
		var cookie = readCookie("mzumzu");
		var title = cookie ? cookie : getPreferredStyleSheet();
		setActiveStyleSheet(title);
		initForm();
	}
};
window.onunload = function(e) {
	if (d.getElementById) {
		var title = getActiveStyleSheet();
		createCookie("mzumzu", title, 0);
	}
};