map.addEventListener("click", function(e){
var onclick=0;
if(onclick%2==0){
onclickPP;
var myP1 = new BMap.Point(e.point.lng,e.point.lat);
alert("onclick="+onclick);
alert("" + e.point.lng + ", " + e.point.lat);
}
else{
onclickPP;
var myP2 = new BMap.Point(e.point.lng,e.point.lat);
alert("" + e.point.lng + ", " + e.point.lat);
driving2.search(myP1, myP2); //
alert("onclick="+onclick);
alert((map.getDistance(myP1, myP2)).toFixed(2)+" ");
}
});redeclare onclick=0 every time the listener calls? But I write the declaration outside the listener and print the value of onclick for null,. What can I do to prevent me from declaring onclick? every time the listener is called?