function hide_div(which_div)
{
var a = document.getElementById(which_div);
a.style.display = "none";
}


function show_div(which_div)
{
var a = document.getElementById(which_div);
a.style.display = "block";
}


function checkInputIn(which_form, which_input, should_be)
{
var a = eval("document.forms."+which_form+"."+which_input+".value");
if (a == should_be)
	{
	eval("document.forms."+which_form+"."+which_input+".value = '';");
	}
}

function checkInputOut(which_form, which_input, should_be)
{
var a = eval("document.forms."+which_form+"."+which_input+".value");
if (a == "")
	{
	eval("document.forms."+which_form+"."+which_input+".value = '"+should_be+"';");
	}
}