// General Javascript functions for SwissPasses.com



//-------------------------------------------------------------

// Check if an element can be made transparent

//-------------------------------------------------------------

function supportsOpacity( el ) {

	if ( el.style.opacity != undefined )

		return true;

	if( el.style.MozOpacity != undefined )

		return true;

	if ( el.style.filter != undefined )

		return true;

	return false;

}

	

//-------------------------------------------------------------

// Set an element's transparency

//-------------------------------------------------------------

function setOpacity( el, opaciLevel ) {

	if ( el.style.opacity != undefined ) {

		el.style.opacity = opaciLevel;

	} else if( el.style.MozOpacity != undefined ) {

		el.style.MozOpacity = opaciLevel;

	} else if ( el.style.filter != undefined ) {

		var oplvl = Math.round(opaciLevel*100);

		el.style.filter="alpha(opacity=" + oplvl + ")";

	}

}





//-------------------------------------------------------------

// Add a CSS Class to an element.

//-------------------------------------------------------------

function addClassName (elem, className) {

    removeClassName (elem, className);

    elem.className = (elem.className + " " + className).trim();

}



//-------------------------------------------------------------

// Remove a CSS Class to an element.

//-------------------------------------------------------------

function removeClassName (elem, className) {

    elem.className = elem.className.replace(className, "").trim();

}



//-------------------------------------------------------------

// Used to trim whitespace from start/end of class names.

//-------------------------------------------------------------

String.prototype.trim = function() {

    return this.replace( /^\s+|\s+$/, "" );

}