function lhc() {
 if (document.styleSheets) {
  var wrk = document.getElementById("main");
	wrk.href="alt.css"
 }
}
function lnc() {
 if (document.styleSheets) {
  var wrk = document.getElementById("main");
	wrk.href="style.css"
 }
}
function hv() {
 document.write('<p>Change to: <span class="acc" id="tog"><a href="#" onClick="lhc();lhc1();">High Contrast</a></span></p>')
}

function lhc1 () {
 document.getElementById("tog").innerHTML='<a href="#" onclick="lnc();lnc1();">Normal Contrast</a>'
}
function lnc1 () {
 document.getElementById("tog").innerHTML='<a href="#" onclick="lhc();lhc1();">High Contrast</a>'
}