html触发js参数怎么用,js 绑定带参数的事件以及手动触发事件

1.html代码

标题一

标题二

标题三

标题四

div>

内容一

内容二

内容三

内容四

2 .js部分

var tab = document.getElementById("tab").getElementsByTagName("h2");

function swap(n) {

return function() {

for(var i=0; i

document.getElementById("tabcon" + i).style.display = "none";

document.getElementById("tab" + i).className = "";

}

document.getElementById("tabcon" + n).style.display = "block";

document.getElementById("tab" + n).className = "focus";

}

}

for(var i=0; i

tab[i].setAttribute("id", "tab" + i);

if(window.addEventListener) {

tab[i].addEventListener("mouseover", swap(i), false);

} else if(window.attachEvent) {

tab[i].attachEvent("onmouseover", swap(i));

}

}

var tabcon = document.getElementById("tabcon").getElementsByTagName("dd");

for(i=0; i

tabcon[i].setAttribute("id", "tabcon" + i);

}

if(document.createEvent) {

var evObj = document.createEvent('MouseEvents');

evObj.initEvent( 'mouseover', true, false);

tab[0].dispatchEvent(evObj);

} else if( document.createEventObject) {

tab[0].fireEvent('onmouseover');

}