b=0;

function validate(form) {
	if (b==1) {
		form.reset();
		form.name.focus();
		b=0;
	return false;
	} else {
		if (form.email!=null) {
			s=form.email.value; p=s.indexOf(" "); k=s.indexOf("@"); K=s.indexOf("."); l=s.length;
			if ((l<5) || (p>=0) || (k<=0) || (k>=l-2) || (k>K) || (K<=0) || (K>=l-1)) {alert("Please enter your friend email address!");return false;}
		}

		if (form.name.value.length<3) {alert("Please enter friend's name!");return false;}
		if (form.lname!=null) {if (form.lname.value.length<3) {alert("Please enter friend'slast name!");return false;}}
		if (form.ads!=null) {if (form.ads.value.length<6) {alert("Please enter friend's address!");return false;}}
		if (form.phone!=null) {if (form.phone.value.length<6) {alert("Please enter friend's phone number!");return false;}}
		if (form.exp!=null) {if (form.exp.value.length<6) {alert("Please enter friend's experience!");return false;}}
		if (form.semail!=null) {
			s=form.semail.value; p=s.indexOf(" "); k=s.indexOf("@"); K=s.indexOf("."); l=s.length;
			if ((l<5) || (p>=0) || (k<=0) || (k>=l-2) || (k>K) || (K<=0) || (K>=l-1)) {alert("Please enter your  email address!");return false;}
		}
	}
}