function flip(e){
        var menustyle = eval(getStyleObj(e));
        var o_icon = document.getElementById('plus_minus_id');
                if (menustyle.display=="none"){
                        menustyle.display='';
                        o_icon.src="../include/minus.JPG";
                }
                else{
                        menustyle.display="none";
                        o_icon.src="../include/plus.JPG";
                }
                                
}
function getStyleObj(elem,parent) {
      if (document.layers) {
            if (parent) {
                  return "document."+parent+".document."+elem;
            } else {
                  return "document."+elem + ".style";
            }
      } else if (document.all) {
            return "document.all."+elem + ".style";
      } else if (document.getElementById) {
            return "document.getElementById('"+elem+"').style";
      }
}
function echeck(str) {
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    return false
		 }

 		 return true					
	}

function trim(inputString) {
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.
   if (typeof inputString != "string") { return inputString; }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings
   }
   return retValue; // Return the trimmed string back to the user
} // Ends the "trim" function


function OnSubmitForm() {
	/*if (trim(document.Form1.txtFullName.value) == ""){
		alert ('You must fill in User name.');
		document.Form1.txtFullName.focus();
		return false;
	}*/
	if (echeck(document.Form1.txtEmail.value) == false){
		alert ('Invalid email address. Input again!');
		document.Form1.txtEmail.focus();
		return false;
	}
	
	if (trim(document.Form1.txtPassword.value) == ""){
		alert ('You must input password.');
		document.Form1.txtPassword.focus();
		return false;
	}
	pass=document.Form1.txtPassword.value;
	cf=document.Form1.txtConfirm.value;
	if (pass!=cf)
	{
		alert ('Password defferent Confirm password. You must input password again.');
		document.Form1.txtPassword.focus();
		return false;
	}

	document.Form1.submit();
	return true;
}