/*Function to get window dimensions by support rather than browser */ 

		function getWinDims() {
			var result=new Array();
			if(window.innerWidth) {
				result[0]=window.innerWidth; result[1]=window.innerHeight;
				return result;
				}
			if(document.documentElement && document.documentElement.clientWidth) {
				if(document.clientWidth) {
					result[0]=document.clientWidth; result[1]=document.clientHeight;
					} else {
					result[0]=document.documentElement.clientWidth; result[1]=document.documentElement.clientHeight;
					}
				return result;
				}
			if(document.body) {
				result[0]=document.body.clientWidth; result[1]=document.body.clientHeight;
				return result;
				}}

function Is() {
	var agent  = navigator.userAgent.toLowerCase();
	var plat  = navigator.platform.toLowerCase();

    this.major = parseInt(navigator.appVersion);
    this.minor = parseFloat(navigator.appVersion);

    this.ns    = ((agent.indexOf('mozilla')   !=   -1) &&
                 ((agent.indexOf('spoofer')   ==   -1) &&
                 (agent.indexOf('compatible') ==   -1)));
    this.ns2   = (this.ns && (this.major      ==    3));
    this.ns3   = (this.ns && (this.major      ==    3));
    this.ns4b  = (this.ns && (this.major      ==    4) &&
                 (this.minor                  <= 4.03));
    this.ns4   = (this.ns && (this.major      >=    4));
    this.ns6    = (this.ns && (this.major     >=    5));
    this.ns7    = (this.ns && (this.major     >=    7));
    this.ie    = (agent.indexOf("msie")       !=   -1);
    this.ie3   = (this.ie && (this.major      <     4));
    this.ie4   = (this.ie && (this.major      ==    4) &&
                 (agent.indexOf("msie 5.0")   ==   -1));
    this.ie5   = (this.ie && (this.major      ==    4) &&
                 (agent.indexOf("msie 5.0")   !=   -1));
    this.ie55  = (this.ie && (this.major      ==    4) &&
                 (agent.indexOf("msie 5.5")   !=   -1));
    this.cam   = (agent.indexOf('camino')     !=   -1);
    this.opera = (agent.indexOf('opera')      !=   -1);
    this.saf   = (agent.indexOf('safari')     !=   -1);
    this.ff    = (agent.indexOf('firefox')    !=   -1);
    this.kong  = (agent.indexOf('konqueror')  !=   -1);
    this.linux = (plat.indexOf('linux')       !=   -1);
    this.w32   = (plat.indexOf('win32')       !=   -1);
    this.mcp   = (plat.indexOf('macppc')      !=   -1);
    this.m68   = (plat.indexOf('mac68k')      !=   -1);
    this.mac   = (this.mcp || this.m68);
    this.winie   = (this.ie && this.w32);
}


 



function getAngle(this_x,this_y,that_x,that_y) { 
	var r=360+Math.round(Math.atan2(that_y-this_y,that_x-this_x)/0.017453293);
	r-=360*(r>=360); return r;
	}	//returns the angle in degrees formed by the horizontal plane running through 
		//this and a line from this to that, reckoning clockwise

function signOf(n) { return n>=0; } //true if n is 0 or greater, false if negative

function toggleBool(tf) { return !tf }
/*function toggleBool(tf) { if(tf) return false;
							else return true } //true if arg if false, false if true
*/

function rndInRange(lower,upper) {	return (lower+Math.floor(Math.random()*(++upper-lower))); } 
//returns a random integer in the range	lower to upper. Either or both may be negative

function posneg() {return -1+2*Math.floor(Math.random()+.5)} // returns 1 or -1 at random. 
															 //useful for eg, reversing direction 
															 //of a moving object at random


function showhide() { //args in pairs ("div1",true,"div2",false..) true to show, false to hide. Note quotes
	var a=arguments,vh;
	for(var loop=0;loop<a.length;loop+=2) {
		a[loop+1] ? vh="visible" : vh="hidden";
		changeObjectVisibility(a[loop],vh);
		}}

	
function cap(s) { //cap initial letter of s
	var i=s.charAt(0);
	return i.toUpperCase()+s.substr(1);
	}
	
	
	
function percentageOf(total,portion) {return 100/total*portion }	//what percentage of total is portion?	eg percentageOf(200,50) returns 25
		
function percent(total,portion) {return total/100*portion }	//what is portion percent of total?	eg percent(200,50) returns 100
		

function new_visit() {
	var url_pattern=/(\w+):\/\/([\w.]+)\/(\S*)/;
	var r1,r2;
	if(document.referrer) {
		var docref=document.referrer;
		var docloc=document.URL; 
		r1=docref.match(url_pattern);//if(!r1) r1=new Array(" "," ","2");
		r2=docloc.match(url_pattern);
		return r1[2]!=r2[2];
	} else {return true;}
	}
	
function getFileName() {
	var docloc, url_pattern=/(\w+):\/\/([\w.]+)\/(\S*)/;
	var r1,slash,pt,r2;
		if(document.URL) {
			docloc=document.URL; pt=-1;
			while(pt==-1) {
				pt=docloc.lastIndexOf('.php');
				if(pt==-1) { docloc += 'index.php';}
				}
			pt--; slash=docloc.lastIndexOf('/');
			return docloc.substr(slash+1,pt-slash);
		} else {return 'index';}
		}

	
function assign_page_order() {
			for(var loop=0;loop<arguments.length;loop++) eval(arguments[loop]+'='+loop);
			}

function getObject(objectId) {
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId);
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId);
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	return document.layers[objectId];
    } else {
	return false;
    }
} // getObject

function getStyleObject(objectId) {
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	return document.layers[objectId];
    } else {
	return false;
    }
} // getStyleObject

function getObjectPosition(objectId) {
	var xy=new Array();
    // cross-browser function to get an object's xy coords given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	xy[0] = document.getElementById(objectId).style.top;
	xy[1] = document.getElementById(objectId).style.left;
alert('dom');
	return xy;
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	xy[0] = document.all(objectId).style.top;
	xy[1] = document.all(objectId).style.left;
alert('ie');
	return xy;
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	xy[0] = document.layers[objectId].top;
	xy[1] = document.layers[objectId].left;
alert('lay');
	return xy;
    } else {
	return false;
    }
} // getStyleObject

function changeObjectVisibility(objectId, newVisibility) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.visibility = newVisibility;
	return true;
    } else {
	// we couldn't find the object, so we can't change its visibility
	return false;
    }
} // changeObjectVisibility

function changeObjectBG(objectId, newBG) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.backgroundColor = newBG;
	return true;
    } else {
	// we couldn't find the object, so we can't change it
	return false;
    }
} // changeObjectBackground

function changeObjectColour(objectId, newColour) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.color = newColour;
	return true;
    } else {
	// we couldn't find the object, so we can't change its colour
	return false;
    }
} // changeObjectColour

function moveObject(objectId, newXCoordinate, newYCoordinate) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.left = newXCoordinate;
	styleObject.top = newYCoordinate;
	return true;
    } else {
	// we couldn't find the object, so we can't very well move it
	return false;
    }
} // moveObject by top-left

function moveObject_br(objectId, newXCoordinate, newYCoordinate) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.right = newXCoordinate;
	styleObject.bottom = newYCoordinate;
	return true;
    } else {
	// we couldn't find the object, so we can't very well move it
	return false;
    }
} // moveObject by bottom right


function Globals() {
	this.newvisit = new_visit();
	this.nv = this.newvisit ? 1 : 0;
	}
	
var G = new Globals(); G.intID=null;