function valida(){

var vEmail=document.memReg.email.value;

var at="@";
var dot=".";
var Ist=document.memReg.email.length;
var Iat=vEmail.indexOf(at);
var Idot=vEmail.indexOf(dot);

if(document.memReg.regID.value==""){
alert("Please enter registration ID");
document.memReg.regID.focus();
return false;
}

if(document.memReg.batch.value==""){
alert("Please enter the batch");
document.memReg.batch.focus();
return false;
}

if(document.memReg.fName.value==""){
alert("Please enter first name");
document.memReg.fName.focus();
return false;
}

if(document.memReg.lName.value==""){
alert("Please enter last name");
document.memReg.lName.focus();
return false;
}

if(document.memReg.telephone.value==""){
alert("Please enter Telephone number");
document.memReg.telephone.focus();
return false;
}

if (isNaN(document.memReg.telephone.value))
{
document.memReg.telephone.value = "";
alert("Telephone field should be a number");
document.memReg.telephone.focus();
return false;
}

if(document.memReg.email.value==""){
alert("Please enter email address");
document.memReg.email.focus();
return false;
}
	else if(vEmail.indexOf(at)==-1||vEmail.indexOf(at)==0||vEmail.indexOf(at)==Ist){
	alert("Please enter correct email");
	document.memReg.email.focus();
	return false;
	}
	else if(vEmail.indexOf(dot)==-1||vEmail.indexOf(dot)==0||vEmail.indexOf(dot)==Ist){
	alert("Please enter correct email");
	document.memReg.email.focus();
	return false;
	}
	else if(vEmail.indexOf(at,(Iat+1))!=-1){
	alert("Please enter correct email");
	document.memReg.email.focus();
	return false;
	}
	else if(vEmail.substring(Iat-1,Iat)==dot||vEmail.substring(Iat+1,Iat+2)==dot){
	alert("Please enter correct email");
	document.memReg.email.focus();
	return false;
	}
	else if(vEmail.indexOf(dot,(Iat+2))==-1){
	alert("Please enter correct email");
	document.memReg.email.focus();
	return false;
	}
	else if(vEmail.indexOf(" ")!=-1){
	alert("Please enter correct email");
	document.memReg.email.focus();
	return false;
	}


/////////////////////////VALIDATING IMAGE EXTENTION//////////////
//var extensions = new Array("jpg","jpeg","gif","png","bmp");
var extensions = new Array("jpg");
var image_file = document.memReg.iname.value;     
var image_length = document.memReg.iname.value.length;     
var pos = image_file.lastIndexOf('.') + 1;     
var ext = image_file.substring(pos, image_length);  
var final_ext = ext.toLowerCase();  

if(final_ext != "jpg" && image_file != ""){
alert("You must upload an image file with .jpg extension");
return false;
}
////////////////////////////////////////////////////////////////


if(document.memReg.secretA.value==""){
alert("Please enter secret question");
document.memReg.secretA.focus();
return false;
}

if(document.memReg.password.value==""){
alert("Please enter password");
document.memReg.password.focus();
return false;
}
if(document.memReg.repass.value==""){
alert("Please retype the password");
document.memReg.repass.focus();
return false;
}

if(document.memReg.password.value!=document.memReg.repass.value){
alert("Password dose not match");
document.memReg.password.value = "";
document.memReg.repass.value = "";
document.memReg.password.focus();
return false;
}

}