function checkParams_SpecialOffer(){
	var username=document.contactform.username.value;
	var email=document.contactform.email.value;
	var comments=document.contactform.comments.value;
		
	if(username==""){
		alert("Please enter your name");
		return false;
	}else if(email=="" || !emailValidation(email)){
		alert("Please enter your email");
		return false;
	}else if(comments=="" || comments=="Enter details of your property"){
		alert("Please enter some details of your property");
		return false;
	}else{
		document.contactform.submit();
		return true;
	}	
}

function doClear_SpecialOffer(){
	if(document.contactform.comments.value=="Enter details of your property")
		document.contactform.comments.value="";
}

function emailValidation(email){
	var regexp=/^[a-zA-Z][A-Za-z0-9|_]*((\.)[a-zA-Z0-9|_]+)*@([0-9]*[a-zA-Z][0-9]*)+((\.)([0-9]*[a-zA-Z][0-9]*)+)+$/;
	if(email.search(regexp)==-1){
		return false;
	}else{ 
		return true;
	}
}