regex - Setting regular expression to validate URL format in Adobe CQ5 -

i want validate url inside textfield using adobe cq5, set properties regex , regextext usual, reason not working:

                <facebook                      jcr:primarytype="cq:widget"                      emptytext="http://www.facebook.com/account-name"                      fielddescription="set facebook url"                      fieldlabel="facebook"                      name="./facebookurl"                      regex="/^(http://www.|https://www.|http://|https://)[a-z0-9]+([-.]{1}[a-z0-9]+)*.[a-z]{2,5}(:[0-9]{1,5})?(/.*)?$/"                      regextext="invalid url format"                      xtype="textfield"/>

so when type inside component can see error message @ console:

uncaught typeerror: this.regex.test not function 

to more accurate error comes line:

        if (this.regex && !this.regex.test(value)) {

i tried several regular expressions , none of them worked. guess problem regular expression itself, because in other hand have other regex evaluate email address, , works fine:

/^[a-za-z0-9]+[\\._]*[a-za-z0-9]*@[a-za-z.-]+[\\.]+[a-za-z]{2,4}$/ 

any suggestions? in advance.

the syntax of regex seems treat forward slashes (/) special characters. since want parse url containing slashes, guess should escape them twice this: '\\/' instead of '/'. result be:

/^(http:\\/\\/www.|https:\\/\\/www.|http:\\/\\/|https:\\/\\/)[a-z0-9]+([-.]{1}[a-z0-9]+)‌​*.[a-z]{2,5}(:[0-9]{1,5})?(\\/.*)?$/ 

you need escape them twice because string compiled regex must contain '\/' escape slashes, introduce backslash in string have escape backslash too.