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我正试图做一个功能,显示不同的东西时,在标签区域中由不同的ID调用。如何获取调用函数的ID?
我读过的答案类似的要求,但我无法弄清楚我的错误。
function Over() {
if (this.id == "cc") {
el = document.getElementById("Box1")
el.style.display = 'block';
} else if (this.id == "mm") {
el = document.getElementById("Box2")
el.style.display = 'block';
} else if (this.id == "ca") {
el = document.getElementById("Box3")
el.style.display = 'block';
}
}
function Out() {
if (this.id == "cc") {
el = document.getElementById("Box1")
el.style.display = 'none';
} else if (this.id == "mm") {
el = document.getElementById("Box2")
el.style.display = 'none';
} else if (this.id == "ca") {
el = document.getElementById("Box3")
el.style.display = 'none';
}
}
#Box1, #Box2, #Box3 {
display: none;
top: 250px;
width: 20%;
height: 100px;
background-color: red;
margin-left: 38%;
position: absolute;
border: solid;
border-color: black;
z-index: 100;
border-radius: 10px;
-moz-border-radius: 10px;
/* firefox */
-webkit-border-radius: 10px;
/* safari, chrome */
text-align: center;
}
#Box2 {
top: 450px;
width: 10%;
height: 100px;
background-color: green;
margin-left: 18%;
}
#Box3 {
top: 50px;
width: 3%;
height: 50px;
background-color: yellow;
margin-left: 0;
}
<img src="ticinello2.jpg" id="imgmap" alt="Mappa" usemap="#parkmap">
<map name="parkmap" id="map">
<area shape="poly" coords="326,196,321,370,424,283,426,197" target="_blank" alt="polycc" href="#" onmouseover=Over.call(this) onmouseout="Out.call(this)" id="cc" />
<area shape="poly" coords="426,198,554,458,457,553,328,404,324,404,324,375" target="_blank" alt="polymm" href="#" onmouseover=Over.call(this) onmouseout="Out.call(this)" id="mm" />
<area shape="poly" coords="328,405,324,412,325,675,330,681,451,554" target="_blank" alt="polyca" id="ca" href="#" onmouseover="Over.call(this)" onmouseout="Out.call(this)" />
</map>
你传递的参数'this'到功能('在()','出()')不带参数。给它们添加一个参数,使它们成为'function Over(e){...}'和'Out(e){...}'函数,然后通过执行'e.id'而不是'this .id'。 – Santi
@Santi Or,甚至更好,将它们更改为'function Over(this){...}'。 – Feathercrown
@Santi实际上,他没有传递'this',他使用'call',它改变函数内部的'this'属性。 – Feathercrown