function updatePage() {
	//  alert("Привет");
 var cashEl = document.getElementById("cash");
 var pomeshenie = document.getElementById("pomeshenie").value

 theGroup = document.theForm.gender;
 for (i=0; i< theGroup.length; i++) {
     if (theGroup[i].checked) {
	 var yarkost = theGroup[i].value;
	 break;
	 }
   }

function replaceText(el, text) {
  if (el != null) {
    clearText(el);
    var newNode = document.createTextNode(text);
    el.appendChild(newNode);
  }
}

  replaceText(cashEl, pomeshenie*yarkost);
}