function validRequired(formField){
var result = true;
	if (formField.value == "") {
		alert('Please enter a value for the "' + formField.name +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}

function validSubject(formField){
var result = true;
	if (formField.value.selected == "") {
		alert('Please enter a value for the "' + formField.subject +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}


function validEmail(formField) {
	var str = formField.value;
	var result = true;
	
	if (!validRequired(formField))
    {
		return false;
	}
	
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert(" Please Enter valid E-mail ID")
		   formField.focus();
		   return false
		}

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

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

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

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

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

function validEmail_showError(formField) {
		   alert(" Please Enter valid E-mail ID")
		   formField.focus();
}


function validNumber(formField)
{   
	var result = true;
	var i;
	var s = formField.value;
	
	if (!validRequired(formField))
    {
		return false;
	}
	
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9")))
		{
		   alert(" Please Enter valid  "+ formField.name)
		   formField.focus();
    	   return false;
		}
    }
    // All characters are numbers.
    return result;
}

function validUSPhoneNumber(formField) 
{
	var result = true;
	var s = formField.value;
	
	if (!validRequired(formField))
    {
		return false;
	}
     // Check for correct phone number
     rePhoneNumber = new RegExp(/^\([1-9]\d{2}\)\s?\d{3}\-\d{4}$/);
 
     if (!rePhoneNumber.test(s)) {
          alert("Phone Number Must Be Entered As: (xxx) xxx-xxxx");
		   formField.focus();
		   result = false;
     }
 
    return result;
}


function SelectRequired(formField)
{
  var result = true;
  if (formField.value == "Select") {
		alert('Please enter a value for the "' + formField.name +'" field.');
		formField.focus();
		result = false;
	}	
	return result;
}



function popupwindow(mypage,myname,w,h,scrolling){
	
if(!w)
	w = screen.width;
if(!h)
	h = screen.height;
	
  var win= null;
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  var settings  ='height='+h+',';
      settings +='width='+w+',';
      settings +='top='+wint+',';
      settings +='left='+winl+',';
      settings +='scrollbars='+scrolling+',';
      settings +='resizable=yes';
  win=window.open(mypage,myname,settings);
}