function judgeEnv(){

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

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

function popup(url,width,height){
    popwin = window.open(url,'mywin',eval('"width='+width+',height='+height+',scrollbars=1,scrolling=1"'))
    popwin.focus();
}



function imageChange(imgName,imgNum){
    document.images[imgName].src = IMG[imgNum].src
}