window.onload = companiesInit;

function companiesInit() {
	if ( !document.getElementById || !document.createElement ||
		 !document.getElementById( 'companies' ) )
		 return false;

	var container = document.getElementById( 'companies' );
	var links = container.getElementsByTagName( 'a' );

	if ( links.length <= 0 )
		return false;

	for ( var i = 0; i < links.length; i++ ) {
		if ( !links[i].getElementsByTagName( 'img' ) )
			continue;

		//greyOutImage( links[i].getElementsByTagName( 'img' )[0] );
		links[i].onmouseout = function(e) { colorizeImage( this.getElementsByTagName( 'img' )[0] ); };
		links[i].onmouseover = function(e) { greyOutImage( this.getElementsByTagName( 'img' )[0] ); };
	}

	//container.style.visibility = 'visible';
}

function greyOutImage( image ) {
	var imageSrc = image.src;

	if ( imageSrc.indexOf( '_grey' ) >= 0 )
		return false;

	image.src = imageSrc.replace( '.gif', '_grey.gif' );
}

function colorizeImage( image ) {
	var imageSrc = image.src;

	if ( imageSrc.indexOf( '_grey' ) < 0 )
		return false;

	image.src = imageSrc.replace( '_grey', '' );
}