var locate = window.location
document.joe.burns.value = locate

var text = document.joe.burns.value
var res = delineate(text);

function delineate(str){

theleft = str.indexOf("?") + 1;
theright = str.lastIndexOf("+");
return(str.substring(theleft, theright));
}

var zork = res;

document.matt.u1.value = zork;