After the mouse event when the mouse moves over an object, the object will trigger onclick event and execute onclick Event call.
Reality mouse click
window.onload = function () { var nav=document.getElementsByClassName("nav") var acc = document.getElementsByClassName('acc'); var bg_a = document.getElementsByClassName('bg_a'); for (var i=0;i<acc.length;i++) { acc[i].index = i; acc[i].onclick = function () { console.log(bg_a) for (var i=0;i<acc.length;i++) { bg_a[i].style.display = 'none'; console.log(bg_a) } bg_a[this.index].style.display = 'block' console.log(bg_a) } } }
When the button to trigger onclick event,