document.getElementsByClassName = function(cl) {
var retnode = [];
var myclass = new RegExp('\\b'+cl+'\\b');
var elem = this.getElementsByTagName('*');
for (var i = 0; i < elem.length; i++) {
var classes = elem[i].className;
if (myclass.test(classes)) retnode.push(elem[i]);
}
return retnode;
};



function  txcontenthide_toggleVisibility( id ){
	els = document.getElementsByClassName ( 'hidingContent' + id )
	for (var i = 0; i < els.length; i++) {
		newClassName = els[i].className.replace( /hidingContentDisplay0/, 'hidingContentDisplay1' );
		if ( newClassName == els[i].className ) newClassName = els[i].className.replace( /hidingContentDisplay1/, 'hidingContentDisplay0' );
		els[i].className = newClassName
	}
}