var isClean = true;
function doChange(){
	isClean = false;
}
function handleScroll() {
    this.rows++;
}
function trapEvents(){
  if(document.forms[0] != null){
    for (var j = 0; j < document.forms.length; j++) {				
      var name = document.forms[j].name;
      var prefix = name.substr(0, 4);
      if(prefix == "reg_") {	   
        for (var i = 0; i < document.forms[0].elements.length; i++){
          document.forms[j].elements[i].onchange = doChange;
          if(document.forms[j].elements[i].type == "textarea") {
            document.forms[j].elements[i].onscroll = handleScroll;
          }
        }
      }
    }
  }
}
function checkChange(){
	if(!isClean){
		return confirm("You have data to save. Move anyway?");
	} else {
		return true;
 }
}