// JavaScript Document
function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}

function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
}
}
}

var preloadFlag = false;
function preloadImages() {
if (document.images) {
index_03_over = newImage("images/index_03-over.gif");
index_04_over = newImage("images/index_04-over.gif");
index_05_over = newImage("images/index_05-over.gif");
index_06_over = newImage("images/index_06-over.gif");
index_07_over = newImage("images/index_07-over.gif");
preloadFlag = true;
}
}

function checkNaN(formelement,text)
{
	if (isNaN(formelement.value))
	{
  alert('Enter Numeric '+text);
  formelement.focus();
	return false;
  }
	else
	{
	return true;
	}
}


function checkEmail(formelement,text)	
{
	if(formelement.value!='')
	{
		var b=formelement.value.indexOf('@');
		var c=formelement.value.indexOf('.');
		var d=c-b;
		var len=formelement.value.length;
		if((d==0)||(c==-1)||(b==-1)||(d==1)||((len-c)==1))

		{
			alert("Enter a valid "+text);
			formelement.focus();
			return false;
		}
		else
		{
			return true;
		}
	}
}

function checkBlank(formelement,text)

{

	if (formelement.value=='')

	{

  alert('Enter '+text);

  formelement.focus();

	return false;

  }

	else

	{

	return true;

	}

}

function validate_feedback()

	{	
		if(!checkBlank(document.login_frm1.txt_fname,'Name')) return false;
		if(!checkBlank(document.login_frm1.txt_org,'Organisation Name.')) return false;
		if(!checkBlank(document.login_frm1.txt_phone,'Telephone No.')) return false;
		if(!checkNaN(document.login_frm1.txt_phone,'Telephone No.')) return false;
		if(!checkBlank(document.login_frm1.txt_emailid,'Email address')) return false;
		if(!checkEmail(document.login_frm1.txt_emailid,'Email Address')) return false;
	}