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The understanding of BOM--the relationship between various windows

Source: Internet
Author: User
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---------------------------------------The following is the first HTML

<! DOCTYPE html>
<meta charset= "UTF-8" >
<title></title>
<body>
<ul></ul>
<textarea></textarea>
<input type= "button" value= "Send Message to W2"/>
<input type= "button" value= "Send Message to W3"/>
<input type= "button" value= "Open W3"/>
<input type= "button" value= "Close W3"/>
<iframe src= "w2.html" style= "width:500px;height:400px;" ></iframe>

</body>
<script>
var input=document.getelementsbytagname ("input");
var ul=window.document.getelementsbytagname ("ul") [0];
var text=window.document.getelementsbytagname ("textarea") [0];
var iframe=window.document.getelementsbytagname ("iframe") [0];
var W3;
Input[2].onclick=function () {
W3=window.open (' w3.html ', "W3window", "width=300,height=300");
};
Input[3].onclick=function () {
if (w3==undefined)
{
Alert ("Does not exist w3!");
}
Else
{
if (w3.closed) {
Alert ("W3 has been closed");
}
else{
W3.close ();
}
}
};
Input[1].onclick=function () {

if (w3!=null&&!w3.closed) {
var linode=w3.document.createelement ("Li");//Put in memory
var ul3=w3.document.getelementsbytagname ("ul") [0];//get W3 page under the first UL
var Val=text.value;
Linode.innerhtml=val;
Ul3.appendchild (LiNode);
W3.focus ();
}
Else
{
Alert ("Please open w3! ");
}
};
input[0].onclick= function () {
var winp=iframe.contentwindow;//find the window through the Contentwindow property of the IFRAME
if (WINP) {
var Val=text.value;
var li=winp.document.createelement ("Li");
Li.innerhtml=val;
var ul=winp.document.getelementsbytagname ("ul") [0];
Ul.appendchild (LI);
}

}
</script>

---------------------------------------below is the second page

<! DOCTYPE html>
<meta charset= "UTF-8" >
<title></title>
<body>
<ul></ul>
<textarea></textarea>
<input type= "button" value= "Send message to W1"/>
</body>
<script>
var text=document.getelementsbytagname ("textarea") [0];
var input=document.getelementsbytagname ("input") [0];
input.onclick= function () {
var winp=window.parent;//to find the parent window of the window through the Parent property
if (WINP) {
var li=winp.document.createelement ("Li");
var Val=text.value;
Li.innerhtml=val;
var ul=winp.document.getelementsbytagname ("ul") [0];
Ul.appendchild (LI);
}
}
</script>

-----------------------------------------the third page below

<! DOCTYPE html>
<meta charset= "UTF-8" >
<title></title>
<body>
<ul></ul>
<textarea></textarea>
<input type= "button" value= "Send message to W1"/>
</body>
<script>
var text3=window.document.getelementsbytagname ("textarea") [0];
var input=window.document.getelementsbytagname ("input") [0];
Input.onclick=function () {
var openerwindow=window.opener;//looking for a window to open this window
if (Openerwindow)
{
var li=openerwindow.document.createelement ("Li");
var ul=openerwindow.document.getelementsbytagname ("ul") [0];
var Val=text3.value;
Li.innerhtml=val;
Ul.appendchild (LI);
}
}
</script>

The understanding of BOM--the relationship between various windows

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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