function ShowDiv(){
                    safeToggleFieldDisplay(document.getElementById('usd'),'none');
                    safeToggleFieldDisplay(document.getElementById('jpy'),'none');
                    safeToggleFieldDisplay(document.getElementById('gbp'),'none');
                    safeToggleFieldDisplay(document.getElementById('eur'),'none');

                    var dropdown = document.getElementById("ContentListBox");
                    var index = dropdown.selectedIndex;
                    var selectedDIV = dropdown.options[index].value;
                    safeToggleFieldDisplay(document.getElementById(selectedDIV),'flip');
                }
                
                function safeToggleFieldDisplay(field, sVisibility){
                    try{
	                    if((field) && (field.style)){
	                        if (sVisibility=='flip'){
                                if (field.style.display == 'none'){
                                    sVisibility = 'block'; }
                                else {
                                    sVisibility = 'none'; }
                            }
		                    field.style.display = sVisibility;
	                    }
                    }
                    catch(exception){
	                    //no handling - just preventing page explosions
                    }
                }