// Browser sniffing

function Is() { // Browser sniffing
	agent  = navigator.userAgent.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.major<5));
	this.ns6   = (this.ns && (this.major>=5));

	this.ie    = (agent.indexOf("msie")!=-1);
	if (this.ie) this.minor = parseFloat(agent.substr((agent.indexOf("msie")+5),4));
	this.ie3   = (this.ie && (this.major<4));
	this.ie4    = (this.ie && (this.minor >= 4) && (this.minor < 5) );
	this.ie5    = (this.ie && (this.minor >= 5) && (this.minor < 5.5) );
	this.ie55  = (this.ie && (this.minor >= 5.5) && (this.minor < 6) );
	this.ie6    = (this.ie && (this.minor >= 6) && (this.minor < 7) );
	this.ie5up  = (this.ie && (this.minor >= 5) );
	this.ie55up =(this.ie && (this.minor >= 5.5) );
	this.ie6up =(this.ie && (this.minor >= 6) );

	this.op    = (agent.indexOf("opera") != -1);
	if (this.op) this.minor = parseFloat(agent.substr((agent.indexOf("opera")+6),4));
	this.op4   = (this.op && (this.minor >= 4) && (this.minor < 5));
	this.op5   = (this.op && (this.minor >= 5) && (this.minor < 6));
	this.op5up = (this.op && (this.minor >= 5));
	this.win   = (agent.indexOf("win")!=-1);
	this.mac   = (agent.indexOf("mac")!=-1);
	this.unix  = (agent.indexOf("x11")!=-1);
	this.DOM   = (this.ns6 || this.ie5up || this.op5up);
}
var is = new Is();

// DOM

if(is.ns4){
	doc = "document";
	sty = "";
	htm = ".document";
	img = ".document";
	xpos = "e.pageX";
	ypos = "e.pageY";
	bracketLeft = "[";
	bracketRight = "]";

}else if(is.ie){
	doc = "document.all";
	sty = ".style";
	htm = "";
	img = ".document";
	xpos = "event.x";
	ypos = "event.y";
	bracketLeft = "[";
	bracketRight = "]";

}else if(is.ns6){
	doc = "document.getElementById";
	sty = ".style";
	htm = "";
	img = ".document";
	xpos = "event.x";
	ypos = "event.y";
	bracketLeft = "(";
	bracketRight = ")";
}