function text2Checkbox(cbox) {
	thiscbox = eval(cbox);
	thiscbox.checked = !thiscbox.checked;
	}

 //isDate function
 function isDate(str) {
	 var regexp = /^(\b([0-3][0-9])-([0-1][0-9])-([1-2][0,9][0-9][0-9])\b)$/;
	 return regexp.test(str);
 }

 //isEmail function \b[A-Za-z0-9._%-]+@[A-Za-z0-9._%-]+\.[A-Za-z]{2,4}\b
  function isEmail(str) {
	 var regexp = /^(\b[A-Za-z0-9._%-]+@[A-Za-z0-9._%-]+\.[A-Za-z]{2,4}\b)$/;
	 return regexp.test(str);
 }

 function trim(s) {
  while (s.substring(0,1) == ' ') {
	s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
	s = s.substring(0,s.length-1);
  }
  return s;
}

//togglePointer(id)
function togglePointer(id){
    if(Element.hasClassName(id, 'pointerhand')){
        Element.removeClassName(id, 'pointerhand');
    }
    else{
        Element.addClassName(id, 'pointerhand');
    }
}