var isIE = (navigator.appName.toLowerCase().indexOf('internet explorer')+1?1:0);
var isIE7 = isIE && (navigator.appVersion.toLowerCase().indexOf('msie 7.0')+1?1:0);

var fieldtip = {
	leftPos : -200,  /* used for the tip-field offset left */
	topPos : -5, /* used for the tip-field offset top */
	tipClass : 'hint', /* assumed classname for the tip, used to _find_ it */
	activeTip : null, /* used to store the active tip */
	isvisible: false,
	get : function(parent) {
		for(var i = 0; i < parent.childNodes.length; i++){
			
			if(parent.childNodes[i].className && parent.childNodes[i].className.indexOf(this.tipClass) > -1 ){
				return parent.childNodes[i]; //found the tip, YAY!
			}//nope, keep looking then
		}
		return null;// didn't find the tip, BORK!
	},
	show : function(t){
		var _fieldTop = t.offsetTop;
		var _fieldLeft = t.offsetLeft;

		var _y = _fieldTop;
		var _x = _fieldLeft;

		this.activeTip = this.get(t.parentNode);
		var _tipHeight = this.activeTip.offsetHeight;

		var _tipCanvas = document.getElementsByTagName((document.compatMode && document.compatMode == "CSS1Compat") ? "HTML" : "BODY")[0];

		var _canvWidth = (_tipCanvas.clientWidth) ? _tipCanvas + _tipCanvas.scrollLeft : window.innerWidth + window.pageXOffset;
		var _canvHeight = (window.innerHeight) ? window.innerHeight + window.pageYOffset : _tipCanvas.clientHeight + _tipCanvas.scrollTop;

		//this.activeTip.style.width = ((this.activeTip.max_width) && (this.activeTip.offsetWidth > this.activeTip.max_width)) ? this.max_width + "px" : "auto";
		
		this.activeTip.style.left = (_x + this.leftPos) + "px";
		this.activeTip.style.top = (_y + this.topPos - _tipHeight) + "px";


		if (isIE) {
			this.activeTip.style.left = "0px";
		}
		if (isIE7) {
			this.activeTip.style.left = "-200px";
		}

		/* check canvas bounds */
		if( _x + this.activeTip.offsetWidth > _canvWidth ){
			this.activeTip.style.left = (_canvWidth - this.activeTip.offsetWidth) + "px";
		}
		if( _y + this.activeTip.offsetHeight > _canvHeight ){
			this.activeTip.style.top = (_canvHeight - this.activeTip.offsetHeight) + "px";
		}
		var x = 0;
		for(x = (isIE ? 0 : 1); x < this.activeTip.childNodes.length; x++) {
			if(this.activeTip.childNodes[x].getAttribute('class') == 'content'
			|| this.activeTip.childNodes[x].className == 'content') {			// Well, this is the internet explorer hack!
				break;
			}
		}
		if(this.activeTip.childNodes[x]
		&& this.activeTip.childNodes[x].innerHTML != ''
		&& this.activeTip.childNodes[x].innerHTML != 'undefined'
		&& this.activeTip.childNodes[x].innerHTML != null) {
			this.activeTip.style.visibility = "visible";
			this.isvisible = true;
		}
	},
	hide : function(){
		if(this.activeTip != null){
			this.activeTip.style.visibility = "hidden";
			this.activeTip = null;
			this.isvisible = false;
		}
	},
	toggle : function(t){
		if(this.isvisible) {
			this.hide();
		} else {
			this.show(t);
		}
	}
}