function diseaseCheck(form){
    if(!form.disease.value){
	alert("Enter the Disease.");
	form.disease.focus();
	return false;
    }
}

function snpCheck(form){
    if(!form.snp_id.value){
	alert("Enter the DBsnp RS ID.");
	form.snp_id.focus();
	return false;
    }
}

function geneCheck(form){
	if(!form.gene.value){
		alert("Enter the Gene symbol or Gene name.");
		form.gene.focus();
		return false;
    }
}