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){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

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

 		 return true					
	}


	

 
 function chkData()
 {
    if((document.contact.name.value=="") || (document.contact.name.value=="Name") )
	{
	  alert("Enter the Field: Name ");
	  document.contact.name.value="";
	document.contact.name.focus();
	return false;
	} 
	
	
 
  if(document.contact.email)
	{
	var emailID=document.contact.email
	
	if ((emailID.value==null)||(emailID.value=="") ||(emailID.value=="E-mail") ){
		alert("Please Enter your Email ID")
		emailID.value=""
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	
	}
	 if((document.contact.enquiry.value=="") || (document.contact.enquiry.value=="Enquiry") )
	{
	  alert("Enter the Field: Enquiry ");
	  document.contact.enquiry.value="";
	document.contact.enquiry.focus();
	return false;
	} 
	if((document.contact.txtNumber.value=="") || (document.contact.txtNumber.value=="Enter Security Code") )
	{
	  alert("Enter the Field: Security code ");
	  document.contact.txtNumber.value="";
	document.contact.txtNumber.focus();
	return false;
	}
    document.contact.submit();
	return true;
	
 }