onmouseclick多次點擊

function dianji(obj){

if(obj.innerHTML=="Bye!"){
obj.style.display="none";
} else if (obj.innerHTML=="click3"){
obj.innerHTML="Bye!"
} else if (obj.innerHTML=="click2"){
obj.innerHTML="click3"
} else if (obj.innerHTML=="click1"){
obj.innerHTML="click2"
} else {
obj.innerHTML="click1"
}

}