function showhide(strElement) {

	if (document.all) {
		state = eval( "document.all." + strElement + ".style.display");
	}
	if (document.layers) {
		state = document.layers[strElement].display;
	}
	if (document.getElementById && !document.all) {
		state = document.getElementById(strElement).style.display;
	}
	
	if (state == 'block') {
		state = 'none';
	}
	else {
		state = 'block';
	}
	
	if (document.all) {
		eval( "document.all." + strElement + ".style.display = state");
	}
	if (document.layers) { 
		document.layers[strElement].display = state;
	}
	if (document.getElementById && !document.all) {
		tmpElement = document.getElementById(strElement);
		tmpElement.style.display = state;
	}

}