function checkParams(){
	var username=document.evolveform.username.value;
	var email=document.evolveform.email.value;
	var contactno=document.evolveform.contactno.value;
	var comments=document.evolveform.comments.value;
	
	if(username==""){
		alert("Please enter your name")
	}else if(email=="" || !emailValidation(email)){
		alert("Please enter your email");
	}else if(contactno==""){
		alert("Please enter your contact number");
	}else if(comments=="" || comments=="Write here..."){
		alert("Please put some comments");
	}else
		document.evolveform.submit();
}

function doClear(){
	document.evolveform.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;
	}
}