Call The Click Event Of The Link (anchor Tag) On The Click Of The Button?

I want to call the click event of the link (anchor tag) on the click of the button. I used this code below in the click event of button to call links click event and it works fine in IE.

document.getElementById('linktag').click();

But, this doesn't work in Firefox. I googled a bit and found that in firefox, you have to do something more to achieve this behaviour. So, I ended up doing this on button click to work in firefox:

var link=document.getElementById('linktag');
var e = document.createEvent('MouseEvents');
e.initEvent(

[code]....

The above code does the click on link when I click on the button. But my problem now is that I have defined a link as

<a href="mailto:abc@xyz.com?subject=abc&body=email body">email </a>

and when click is called and mailto links opens my email client, it somehow ignores the subject and body parameters of the link. It works properly when i actually click a link element. but it doesn't work when i simulate the click event by code written above. above dispatching event code somehow ignores the link parameters?