javascript firefox automatically loads iframe and automatically adjusts height and width example_javascript skills

iframe automatically obtains onload height and width

Copy code The code is as follows:

function AutoResize(iframe)
{
//firefox
if(iframe.contentWindow)
{
iframe.height = iframe.contentWindow.document.documentElement.scrollHeight;
iframe.width = iframe.contentWindow. document.documentElement.scrollWidth;

}
//IE
else if(iframe.contentDocument) {

iframe.height = iframe.contentDocument.width;
iframe .width = iframe.contentDocument.height;
}
}

iframe auto-loading:

Copy code The code is as follows:

var tdObj = document.getElementById('ifrtd');
tdObj.innerHTML = 'QQ is loading dynamically... ';

var iframe = document.createElement("iframe");
iframe.src = 'http://www.zbphp.com/';

if (iframe.attachEvent){

//iframe.attachEvent("onload",AutoResize.call(iframe)); #Error reporting
iframe.attachEvent("onload", function(){
AutoResize(iframe);
});
} else {

//iframe.onload = AutoResize.call(iframe); #Error report is not supported
iframe.onload = function(){
AutoResize(iframe) ;
};
}

tdObj.innerHTML = '';
tdObj.appendChild(iframe);

In fact, the iframe.onload here wants to be written as iframe.onload = AutoResize.call(iframe); Unfortunately, an error is reported and it is not supported.

I never knew how to make function calls in javascript. For example, when iframe.onload = function(){} calls a function and has parameters, you can only write it like this instead of passing parameters directly like other programs.

I have seen apply() call() before, but it is not supported even if I try it. Why?