var agent, opversion;
agent = navigator.userAgent.toLowerCase();
isOP  = agent.indexOf('opera')!=-1;
if(isOP){
	var reg1 	   	= new RegExp("opera.([0-9]+\.[0-9]+)");
	var foundArray 	= reg1.exec(agent);
	var reg2 	   	= new RegExp("([0-9]+\.[0-9]+)");
	if(foundArray  != null){
		opversion  	= reg2.exec(foundArray[0]);
		version    	= opversion[0];
	}
}
else version 		= parseInt(navigator.appVersion);
isOP7	 	 		= isOP&&version==7;
isOP7UP	 	 		= isOP&&version>=7;
isNS	 	 		= (agent.indexOf('mozilla')!=-1) && 
					  (agent.indexOf('spoofer')==-1) && 
					  (agent.indexOf('compatible') == -1) && 
					  (agent.indexOf('opera')==-1) && 
					  (agent.indexOf('webtv')==-1) && 
					  (agent.indexOf('hotjava')==-1);
isNS4	 	 		= isNS&&version==4;
isNS60  	 		= isNS&&version==5&&(parseInt(navigator.productSub)<20010726);
isNS6	 	 		= isNS&&version>=5&&!isNS60;
isNS7		 		= isNS6&&parseInt(navigator.vendorSub)==7;
isNS7UP		 		= isNS6&&parseInt(navigator.vendorSub)>=7;
isFF		 		= agent.indexOf('firefox')!=-1;
isFF5UP		 		= isFF&&version>=5;  
isIE	 	 		= agent.indexOf('msie')!=-1;
isIE4	 	 		= isIE&&(agent.indexOf('msie 4')!=-1);
isIE5	 	 		= isIE&&(agent.indexOf('msie 5')!=-1);
isIE55	 	 		= isIE&&(agent.indexOf('msie 5.5')!=-1);
isIE6	 	 		= isIE&&(agent.indexOf('msie 6.0')!=-1);
isIE7	 	 		= isIE&&(agent.indexOf('msie 7')!=-1);
isMac	 	 		= agent.indexOf('mac')!=-1;

var suportedbrowsers = ((isIE5||isIE55||isIE6||isIE7)&&!isOP)||isOP7UP||isFF5UP||isNS6||isNS7||isNS7UP;
if(!suportedbrowsers)document.location.replace('nosuportedbrowser.html');