/**
 * This function filters an email address from the open page.
 * It returns a list of email addresses
 */
function email_address_extraction(){
	let result = [];
	try{
		
		
		$("body *").each(function() {
			let tex = $(this).text();
			let regex = /[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-z]+/g;
			let tmp = tex.match(regex);
			if (tmp !== null){
				//console.log("match!")
				for(let i = 0; i < tmp.length; i++){
					if(!result.includes(tmp[i])){
						result.push(tmp[i]);
					}
				}
			}
		});
	} catch(e){
		console.log(e);
	}
	
	
	return result;
}