// JavaScript Document

function check_lbs() {
txt=document.isn.lbs;
if (txt.value.length<1) { alert("Please, enter your weight"); return false; }
return true;
}

function check_kg() {
txt=document.isn1.kg;
if (txt.value.length<1) { alert("Please, enter your weight"); return false; }
return true;
}

function showit(id) {

some=document.getElementById(id).style;
eval("some.display = \"" + 'block' + "\""); 
}

function hideit(id) {

some=document.getElementById(id).style;
eval("some.display = \"" + 'none' + "\""); 
}