function judgeEnv(){

	if(navigator.userAgent.indexOf('Win') != -1){ OS = "win" }
	if(navigator.userAgent.indexOf('Mac') != -1){ OS = "mac" }

	if(document.all){ BS = "ie" }
	if(document.layers) { BS = "nn" }

	if(OS == "mac" && BS =="ie"){
		env ="spc";
	}
	else{
		env = "reg";
	}
	return env;
}