Password - uppercase characters JavaScript -

excuse if stupid question. i'm doing web design subject @ uni , stuck. have validate password using javascript ensure has , uppsercase, lowercase, numerical character, , @ least 4 characters.

this code have, it's giving me alerts haven't included characters, when have included them i'm still getting alert. appreciated.

var y = document.forms["logindetails"]["password"].value; if (y.length < 4) {     alert("your password needs minimum of 4 characters") } if (y.search[/a-z/i] < 1) {     alert("your password needs lower case letter") } if (y.search[/a-z/i] < 1) {     alert("your password needs uppser case letter") } if (y.search[/0-9/] < 1) {     alert("your password needs number")     return false; } 

your code had several errors

• comparision should <0 not <1 (search returns negative value when regexp not found)
• /i in regexp (case insensitive - not appropriate when trying figure out upper/lower case characters)
• call of search function wrong (usage of [] instead of () )
• in regexp [] missing ([] in regexp means 1 character given range, [a-z] match each lowercase character whereas a-z match string 'a-z')

it should like:

if (y.length < 4) {   alert("your password needs minimum of 4 characters") } else if (y.search(/[a-z]/) < 0) {   alert("your password needs lower case letter") } else if(y.search(/[a-z]/) < 0) {   alert("your password needs uppser case letter") } else  if (y.search(/[0-9]/) < 0) {   alert("your password needs number") } else {     // pass ok }