function checkform1 (form)
{
   if (form.name.value == "") 
   {
    alert( "Please enter your name." );
    form.name.focus();
    return false;
  	}
	
   if (form.email.value == "") 
   {
    alert( "Please enter your Email address." );
    form.email.focus();
    return false;
  	} 
	var emailID=form.email
	if (echeck(emailID.value)==false)
	{
		emailID.value="";
		emailID.focus();
		return false;
	}
	
   if (form.website.value == "") 
   {
    alert( "Please enter your website name." );
    form.website.focus();
    return false;
  	}
	
   if (form.cWebsite1.value == "") 
   {
    alert( "Please enter your competitor's website name." );
    form.cWebsite1.focus();
    return false;
  	}	

	if (form.txtNumber.value == "") 
	 {
		alert( "Please enter the human verification code." );
		form.txtNumber.focus();
		return false;
  	} 
	return true ;
}

function checkform (form)
{
   if (form.email.value == "") 
   {
    alert( "Please enter your Email address." );
    form.email.focus();
    return false;
  	} 
	var emailID=form.email
	if (echeck(emailID.value)==false)
	{
		emailID.value="";
		emailID.focus();
		return false;
	}
	
	 if (form.txtNumber.value == "") 
	 {
		alert( "Please enter the human verification code." );
		form.txtNumber.focus();
		return false;
  	} 
	return true ;
}

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("Please enter a valid Email ID.");
		   return false;
		}
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please enter a valid Email ID.");
		   return false;
		}
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Please enter a valid Email ID.");
		    return false;
		}
		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Please enter a valid Email ID.");
		    return false;
		 }
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Please enter a valid Email ID.");
		    return false;
		 }
		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Please enter a valid Email ID.");
		    return false;
		 }		
		 if (str.indexOf(" ")!=-1){
		    alert("Please enter a valid Email ID.");
		    return false;
		 }
 		 return true;				
	}