window.onload=function () {switch1('butTrafficOff'); switch2('butCriminalOff'); switch3('butCommercialOff');}

function switch1(div) {
	var option=['butTrafficOn','butTrafficOff'];
	for(var i=0; i<option.length; i++) {
		if (document.getElementById(option[i])) {
			obj=document.getElementById(option[i]);
			obj.style.display=(option[i]==div)? "block" : "none";
		}
	}
}

function switch2(div) {
	var option=['butCriminalOn','butCriminalOff'];
	for(var i=0; i<option.length; i++) {
		if (document.getElementById(option[i])) {
			obj=document.getElementById(option[i]);
			obj.style.display=(option[i]==div)? "block" : "none";
		}
	}
}

function switch3(div) {
	var option=['butCommercialOn','butCommercialOff'];
	for(var i=0; i<option.length; i++) {
		if (document.getElementById(option[i])) {
			obj=document.getElementById(option[i]);
			obj.style.display=(option[i]==div)? "block" : "none";
		}
	}
}