//gets the document properties in order to use them as there are many types of browers with different versions
function getDocID(tagLayer)
{
	var tagProp = "";//holds the proerties of tagLayer

	//gets the whichLayer Properties depending of the differnt bowers the user is using
	if (document.getElementById)//this is the way the standards work
		tagProp = document.getElementById(tagLayer);
	else if (document.all)//this is the way old msie versions work
		tagProp = document.all[tagLayer];
	else if (document.layers)//this is the way nn4 works
		tagProp = document.layers[tagLayer];
		
	return tagProp;
}//end of getDocID()

//shoes and hides a <div> using display:block/none from the CSS
function toggleLayer(tagLayer)
{
	var tagStyle = '';//holds the style of tagLayer

	//gets the whichLayer Properties
	tagStyle = getDocID(tagLayer);
	
	if (tagStyle != ''){tagStyle.style.display = tagStyle.style.display? "":"block";}
}//end of toggleLayer()