// helper functions

function log_error(vars, comment) {			
	ajaxFunc('logError', [vars, comment]);
}

// GET element
function getElem(id) {
	elem = document.getElementById(id);
	if (elem) {
		return elem;
	}
}

// GET value of id
function get(id) {
	var elem = document.getElementById(id);
	if (elem) {
		return elem.value;
	}
}

// SET value of id
function set(id, val) {
	var elem = document.getElementById(id);
	if (elem) {
		elem.value = val;
	}
}

// GET style of id
function getStyle(id, property) {
	var elem = document.getElementById(id);
	if (elem) {
		return elem.style[property];
	}
}

// SET style of id
function setStyle(id, property, val) {
	var elem = document.getElementById(id);
	if (elem) {
		elem.style[property] = val;
	}
}

// GET className of id
function getClassName(id) {
	var elem = document.getElementById(id);
	if (elem) {
		return elem.className;
	}
}

// SET className of id
function setClassName(id, val) {
	var elem = document.getElementById(id);
	if (elem) {
		elem.className = val;
	}
}

// GET innerHTML of id
function getHTML(id) {
	var elem = document.getElementById(id);
	if (elem) {
		return elem.innerHTML;
	}
}

// SET innerHTML of id
function setHTML(id, val) {
	var elem = document.getElementById(id);
	if (elem) {
		elem.innerHTML = val;
	}
}

// test for 'checked' element
function isChecked(id) {
	var elem = document.getElementById(id);
	if (elem) {
		if (elem.checked) {
			return true;
		}
	}
}

// set and element as 'checked'
function setChecked(id) {
	var elem = document.getElementById(id);
	if (elem) {
		elem.checked = true;
	}
}

// test for 'disabled' element
function isDisabled(id) {
	var elem = document.getElementById(id);
	if (elem.disabled) {
		return true;
	}
}

// set and element as 'disabled'
function setDisabled(id, bool) {
	var elem = document.getElementById(id);
	if (elem) {
		if (bool == true) {
			elem.disabled = true;
		} else {
			elem.disabled = false;
		}
	}
}

// set the focus on id
function focusOn(id) {
	var elem = document.getElementById(id);
	if (elem) {
		elem.focus();
	}
}

// use YUI to fade in/out an elem
function fadeElem(id, opacity, duration) {
	var attributes = {
		opacity: { to: opacity }
	};
	var anim = new YAHOO.util.ColorAnim('zipcodeDialog', attributes, duration);
	anim.animate();
}

// validation functions

// validate email address
function isValidEmailAddress(val) {
	var filter = /^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i;
	if (filter.test(val)) {
		return true;
	}
}

// validate url
function isValidHttpAddress(val) {
	if (val.substr(0, 7) == 'http://' || val.substr(0, 8) == 'https://') {
		return true;
	}
}

// escape string
function escapeString(val) {
	return escape(val).replace(new RegExp( "\\+", "g" ), "%2B");
}

// show/hide the spinner
function showHideBusy(show) {
	if (getElem('busy')) {
		if (show) {
			//var left = (document.documentElement.clientWidth - 220) / 2;
			//var top = (document.documentElement.clientHeight - 19) / 2;
			var left = 3;
			var top = 5;
			setStyle('busy', 'left', left + 'px');
			setStyle('busy', 'top', top + 'px');
			setStyle('busy', 'display', 'block');
		} else {
			window.setTimeout("setStyle('busy', 'display', 'none')", 1000);
		}
	}
}

function isNumber(val, bool) {
	// bool = true ensures that decimal points are counted as numeric
	if (bool) {
		var numbers = "0123456789.";
	} else {
		var numbers = "0123456789";
	}
	var isNumeric = true;
	var character;

	for (var i=0; i<val.length && isNumeric == true; i++) { 
		character = val.charAt(i); 
		if (numbers.indexOf(character) == -1) {
			isNumeric = false;
		}
	}
	return isNumeric;
}

// string prototypes //

// trim functions
String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
};

String.prototype.ltrim = function() {
	return this.replace(/^\s+/,"");
};

String.prototype.rtrim = function() {
	return this.replace(/\s+$/,"");
};

// capitalize function
String.prototype.capitalize = function() {
	var sInput = this;
	var sOutput, cTemp, sPre, sPost, sLength;
	var sTemp = sInput.toLowerCase();
	var sLength = sTemp.length;
	if (sLength > 0) {
		for (i = 0; i < sLength; i++) {
			if (i == 0) {
				cTemp = sTemp.substring(0, 1).toUpperCase();
				sPost = sTemp.substring(1, sLength);
				sTemp = cTemp + sPost;
			} else {
				cTemp = sTemp.substring(i, i+1);
				if (cTemp == " " && i < (sLength-1)) {
					cTemp = sTemp.substring(i+1, i+2).toUpperCase();
					sPre = sTemp.substring(0, i+1);
					sPost = sTemp.substring(i+2, sLength);
					sTemp = sPre + cTemp + sPost;
				}
			}
		}
	}
	sOutput = sTemp;
	return sOutput;
};

function chr(val) {
	return String.fromCharCode(val);
}

// miscellaneous functions //
function writeCookie(name, value, days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days*24*60*60*1000));
		var expires = "; expires=" + date.toGMTString();
	} else {
		var expires = "";
	}
	document.cookie = name + "=" + value + expires + "; path=/; domain=.technicalgreen.net";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.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;
}

function eraseCookie(name) {
	writeCookie(name, "", -1);
}