function toogle_layer(fname,visible){
  	if (document.layers) { // Netscape
  		if( visible ) { s = 'show' ; b = 'block' ; } else { s = 'hide' ; b = 'none' ; }
  		document.layers[eval('"'+fname+'"')].visibility = s ;
  	} else if (document.all) { // Internet Explorer
  		if( visible ) { s = 'visible' ; b = 'block' ; } else { s = 'hidden' ; b = 'none' ; }
  		document.all[eval('"'+fname+'"')].style.visibility = s ;
  	} else if (document.getElementById) { // Netscape 6
  		if( visible ) { s = 'visible' ; b = 'block' ; } else { s = 'hidden' ; b = 'none' ; }
		document.getElementById(eval('"'+fname+'"')).style.visibility = s ;
	}
}

function toogle_display(fname,b){
	(b) ? s = 'block' : s = 'none' ;
	if (document.layers) { // Netscape
	  document.layers[eval('"'+fname+'"')].display = s ;
	} else if (document.all) { // Internet Explorer
	  document.all[eval('"'+fname+'"')].style.display = s ;
	} else if (document.getElementById) { // Netscape 6
	  document.getElementById(eval('"'+fname+'"')).style.display = s ;
	}
}

function showLayer(fname,b){
	toogle_display(fname,b);
	toogle_layer(fname,b);
}

function setValue( fieldName , fieldValue , form ){
	if(form != undefined && fieldName != undefined ){
		field = form[eval('"'+fieldName+'"')] ;
		if(field != undefined){
			field.value = fieldValue ;
		}
	}
}