// JavaScript Document

// Cross-browser event handling for IE5+, NS6+ and Mozilla/Gecko 
// By Scott Andrew 
function addEvent(elm, evType, fn, useCapture) { 
	if (elm.addEventListener) { 
		elm.addEventListener(evType, fn, useCapture); 
		return true;  
	} else if (elm.attachEvent) { 
		var r = elm.attachEvent('on' + evType, fn); 
		return r; 
	} else { 
		elm['on' + evType] = fn; 
	} 
}// end function addEvent

String.prototype.trim = function () {
	var reExtraSpace = /^\s+(.*?)\s+$/;
	return this.replace(reExtraSpace, "$1");
};

function setCookie(name, value, expires, path, domain, secure) {
	 document.cookie = name + "=" + escape(value) +
		  ((expires) ? "; expires=" + expires.toGMTString() : "") +
		  ((path) ? "; path=" + path : "") +
		  ((domain) ? "; domain=" + domain : "") +
		  ((secure) ? "; secure" : "");
}

function getCookie(name) {
	 var dc = document.cookie;
	 var prefix = name + "=";
	 var begin = dc.indexOf("; " + prefix);
	 if (begin == -1) {
		  begin = dc.indexOf(prefix);
		  if (begin != 0) return null;
	 } else {
		  begin += 2;
	 }
	 var end = document.cookie.indexOf(";", begin);
	 if (end == -1) {
		  end = dc.length;
	 }
	 return unescape(dc.substring(begin + prefix.length, end));
}

function deleteCookie(name, path, domain)	{
	 if (getCookie(name)) {
		  document.cookie = name + "=" + 
				((path) ? "; path=" + path : "") +
				((domain) ? "; domain=" + domain : "") +
				"; expires=Thu, 01-Jan-70 00:00:01 GMT";
	 }
}

function setSearchByCookie(cookieName, cookieValue) {
	//Set this search by cookie.
	setCookie(cookieName, cookieValue);
	
	//Delete all other search by cookies.
	switch(cookieName) {
		case "function":
			deleteCookie("industry");
			deleteCookie("level");
			deleteCookie("location");
			break;
			
		case "industry":
			deleteCookie("function");
			deleteCookie("level");
			deleteCookie("location");
			break;
			
		case "level":
			deleteCookie("function");
			deleteCookie("industry");
			deleteCookie("location");
			break;
			
		case "location":
			deleteCookie("function");
			deleteCookie("industry");
			deleteCookie("level");
			break;

	}//end switch
}