function showLAYER(layName){
	var layObj=getLayOj(layName)
    if(document.layers)layObj.visibility='show'    	//NN用
    if(document.all)layObj.visibility='visible' 	//IE用
}

function hideLAYER(layName){
	var layObj=getLayOj(layName)
	if(document.layers)layObj.visibility='hide'		//NN用
    if(document.all)layObj.visibility='hidden'		//IE用
}

function getVISIBLE(layName){
	var layObj=getLayOj(layName)
	if(document.layers){    						//NN用
          if(layObj.visibility=='show')return 'visible'
      if(layObj.visibility=='hide')return 'hidden'
      if(layObj.visibility=='inherit')return 'inherit'
    }
    if(document.all){      							//IE用
      if(layObj.style.visibility=='')return 'inherit'
      return layObj.visibility
    }
    return ''
}

function getLayOj(layName){  
  if(document.layers) return document.layers[layName]
  if(document.all)    return document.all(layName).style
                       //outputLAYER()を併用する時は
                       //return document.all(layName)にしてください。
}