var nav_square=new Image();nav_square.src='http://www.convertunits.com/img/square.gif';
function urlencode(value){return value.replace(/ /g,"+");}
function checknumber(i,unit){if(!document.newunits.elements["u"+i].value.match(/[a-z']/i)){if(unit===''){alert("Please enter a unit name, not just a number.");document.newunits.elements["u"+i].focus();}else{document.newunits.elements["u"+i].value+=" "+unit;}}}
function newunits(form){location='http://www.convertunits.com/from/'+urlencode(form.u1.value)+'/to/'+urlencode(form.u2.value);return false;}