function showHideDiv(divlayer)
{
if(divlayer!='')
{
var state=document.getElementById(divlayer).style.display;
if(state=='none')
{
document.getElementById(divlayer).style.display='block';
document.getElementById(divlayer).style.visibility='visible';
}
else
{
document.getElementById(divlayer).style.display='none';
document.getElementById(divlayer).style.visibility='hidden';
}
return(false);
};
};