function vnt1(file) {
  date = new Date();
  if (date != null) {
window.open(file,date.getTime(),"width=180,height=150,top=0,left=0,toolbar=no,scrollbars=no,status=no,resizable=no");
                }
            }
			
			
function vnt2(file) {
  date = new Date();
  if (date != null) {
window.open(file,date.getTime(),"width=292,height=450,top=0,left=0,toolbar=no,scrollbars=no,status=no,resizable=no");
                }
            }
			
var IE4 = (document.all) ? 1 : 0;
	if (IE4)
	var timerID = setInterval("enableSubmit()", 200);

	function enableSubmit() {
	
	  if (!IE4) return;
					  
	 	var form = document.formRequest;
		var currentState = form.sub.disabled;
						  
		var newState = !form.frmTxtName.value + !form.frmTxtTelefono.value + !isEmail(form.frmTxtEmail.value);
		
			if (newState != currentState)
				form.sub.disabled = newState;
			}
						
			// Inicio isEmail
			function isEmail(str) {
			 	// are regular expressions supported?
			 	var supported = 0;
			
				if (window.RegExp) {
				var tempStr = "a";
				var tempReg = new RegExp(tempStr);
				
					if (tempReg.test(tempStr)) supported = 1;
					
				}
						  if (!supported) 
							return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
						  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
						  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
						  return (!r1.test(str) && r2.test(str));
						
						}