Rollover image code breaking page

Hey,

I added this code . . .

<a href="https://cnn.com" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage('Image1','','https://notstepfordwives.com/wordpress/wp-content/themes/pixel/images/icons/button2.jpg',1)"><img name="Image1" border="0" src="https://notstepfordwives.com/wordpress/wp-content/themes/pixel/images/icons/button2.jpg"></a>

. . . to my header.php file to use as a rollover menu button. But, it’s breaking the page. I’m getting this error:

Line: 91
Char: 1
Error: Object expected
Code: 0
URL: https://notstepfordwives.com/wordpress

Could someone tell me what I’m doing wrong.